4000 Essential English Words 4 Unit 10: Anton’s Great Discovery

Choose the right word for the given definition.

a formal inspection

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to accept the truth

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an idea about how something is

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knowing a lot about the world

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important

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particle

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decade

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upright

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isolate

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handy

Choose the word that is the better fit for each blank.

Scientists thought that the tiny _____ was not a living thing, so they were very surprised to find that it was indeed _____.

Choose the word that is the better fit for each blank.

My uncle, the carpenter, keeps _____ tools in his truck. However, he keeps the most _____ ones on his tool belt at all times.

Choose the word that is the better fit for each blank.

One way that scientists _____ the different species of early humans is by how they walked. Homo Erectus, for example, walked _____.

Choose the word that is the better fit for each blank.

After sitting in the cell for just one hour, the prisoner felt a _____ to be free. He made a _____ to the officers to release him immediately.

Choose the word that is the better fit for each blank.

Learning how to speak another language is a _____ skill to have in the world of international business. It also can make one into a more _____ person.

Choose the word that is the better fit for each blank.

Jack had a great _____ for a new system, but his boss needs to conduct a thorough _____ to see if it will work.

Choose the word that is the better fit for each blank.

William used a piece of white paper to _____ the different plants in the garden. That made it easier for him to draw a _____ of the leaves of each type of plant.

Choose the word that is the better fit for each blank.

The great pyramids of Egypt were not _____ overnight. In fact, it took many ______ to complete them.

Choose the word that is the better fit for each blank.

As he drove his car onto the _____ , John felt sad. He wanted to travel by airplane, but after looking at ticket prices, he had to _____ that air travel was just too expensive.

Choose the word that is the better fit for each blank.

In maintaining good health, it is important to _____ from eating unhealthy foods. But that doesn’t mean you must _____ all of the foods that you enjoy.

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

Anton’s first microscope had an upright stand.

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

Anton had a longing to become rich.

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

The tiny particles Anton saw were bacteria.

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

Anton classified the particles into different categories.

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

The sophisticated scientists drew diagrams of the bacteria.

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

Anton took a ferry to Holland.

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

Which is true about Anton’s discovery?

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

Why was Anton’s first microscope handy?

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

What was Anton’s plea to the scientists?

ANTON’S GREAT DISCOVERY

Anton Van Leeuwenhoek was a Dutch cloth merchant. His life began to change after he got his first microscope in 1653. It was a very simple microscope. It had a lens in an upright stand. It could make small things look large. It was handy for looking closely at cloth.

Soon, Anton felt a longing to build a more powerful microscope. He dreamed of using it to make an important scientific discovery. He wanted to become famous. Three decades later, he did.

For many years, Anton experimented with microscopes and lenses. Eventually, he constructed a very powerful microscope. If he had sold the concept to others, it would have made him very rich. However, Anton refrained from surrendering his secret to anyone. Instead, he wanted to use it to become famous. So he used his secret microscope to study the natural world.

One day he was looking at saliva from his mouth with the microscope. In the saliva, he saw numerous tiny particles. Some of them were moving! He thought that the particles were tiny organisms. So he isolated them from each other and studied each one carefully. Then he classified them into different categories. Some were round. Others were long and had tails. All were alive.

Anton was so excited. He knew he could become famous now. He was the first person to see these tiny organisms. So he drew diagrams of the organisms and sent them to a group of scientists in London. The scientists were sophisticated men who did not believe tiny, animate organisms could live in our mouths. Anton made a plea for them to come to Holland to see the organisms with their own eyes. The men took a ferry to Holland and met Anton. They performed a careful review of his work, and they conceded that he had made a worthwhile discovery. Anton Van Leeuwenhoek had discovered bacteria. After decades of hard work, he had become famous.

Why didn’t Anton sell his concept of a powerful microscope?