Each of us makes mistakes from time to time. In fact, we can ______ a lot from our mistakes.

Donnie was a_______ student and never answered questions in class. He was ______ to make mistakes. He never finished his homework________he didn't want to make any mistakes. Nothing changed_____ Marry Anne, a teacher, came to our_______.

One morning , Marry Anne asked Donnie to________some questions. After a while Donnie was in tears because he made a mistake. ______ Marry Anne got a box full of erasers from the desk.

“Look, Donnie,” she said standing________him. “I’ve got something to show you.” She ____ the erasers, one at a time, and put them on the desk.

“See these erasers, Donnie?” she continued. “Do you know_______ the erasers become smaller and smaller? That’s because we make mistakes. But we erase the mistakes and try_______. That’s what you must learn.”

“Here,” she said, “I’ll ______ one eraser on your desk, so you will remember that_____ may make mistakes.” Donnie looked at Marry Anne and smiled.

Donnie _______a lot from then on. He knew that everyone had the permission to make mistakes as long as you learned them and tried again.

1.A. take B. make C. get D. bring

2.A. good B. shy C. clever D. small

3.A. glad B. excited C. surprised D. afraid

4.A. because B. so C. if D. but

5.A. after B. while C. until D. when

6.A. row B. class C. team D. classroom

7.A. answer B. ask C. give D. have

8.A. Suddenly B. Quickly C. Luckily D. Carefully

9.A. on B. with C. beside D. to

10.A. put out B. took away C. took out D. took off

11.A. when B. how C. what D. why

12.A. more B. again C. another D. one

13.A. forget B. carry C. leave D. give

14.A. nobody B. somebody C. no one D. everybody

15.A. changed B. got C. learned D. Thought

Most of us use alarm clocks to wake up at the right time for school or work. We look at our watches to know the right time for the bus or train. However, there is also a right time to eat, sleep, exercise, and take medicine. We can’t look at a clock for the right time for these activities. We must listen to the clock inside our bodies: the biological(adj.生物的) clock.

Barbara Wells exercised every morning. She woke up at 6:00 a.m. She ran about two miles before she went to work. But Barbara’s legs and back started to hurt. She did some exercise before she ran. But her legs and back still hurt. She ran slower, but the pain didn’t stop. Barbara talked to her doctor. The doctor said, “Don’t run in the morning. Try to exercise later in the day. That is the time when your body is at the right temperature for exercise after work.” Her legs and back didn’t hurt anymore.

Today, doctors are learning more about chronobiology(n.生物钟学), the study of biological clocks. They are learning about the importance of time for our bodies. For example, it is best for people to go to sleep on time every night and to eat only when they’re hungry. Also, doctors discovered that some illnesses, such as heat attacks, occur(v.发生)most often in the morning. This information tells them that the best time to take heart medication may be at night. When patients take heart medication at night, they may prevent a heart attack in the morning.

Many doctors believe chronobiology(生物钟) can help us live healthier lives. It may be the right time to listen to these doctors!

1.What clocks do you all have inside your bodies?

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2.How far did Barbara Wells run every morning?

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3.How did Barbara Wells’ legs and back get well?

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4.What is the right time for the person who has a heart attack to take heart medication?

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5.What can we learn from the passage?

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