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One of the most famous s1. to study adaptations (适应) was Charles Darwin. He was born in E2. in 1809. He wasn’t the best student in his school, but when he was 16, his father sent him to a medical school. Charles liked spending time outdoors observing nature more than attending medical classes. He dropped out w3. graduating.

Next, Charles’s father sent him to school to become a minister (牧师). This time he made it to graduation. But he didn’t want to do the work of a minister. His friends e4. him to follow his interest in science.

After graduation, Charles was invited to sail on the Beagle as an unpaid scientist. He wasn’t the first choice, but he was the lucky one to go. The Beagle was to travel to South America and then a5. the world. The crew' s task was to make maps of the places they visited.

On D6. 27th, 1831, Charles Darwin sailed from England on the Beagle. The trip was planned to last two years. In f7. , it lasted five. During this time, he saw many a8. things. He collected lots of plants and animals and took them back to England to study.

Twenty-three years later, Darwin p9. an important scientific paper with another man n10. Wallace. Darwin described how some animals have adaptations that help them survive. They are passed on to offspring (后代). Darwin’s ideas about adaptations are still very important to the study of living things.

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Help comes in many different ways and plays an important part in our lives.

A mother wanted to ________ her son to play the piano. She ________ tickets to the concert of a great pianist. ________ they arrived at the theatre, the mother met a friend. She ________ to talk to her friend and didn’t notice her son run away.

At eight o’clock, the lights began to dim (变暗) and the concert was going to ________ . The mother was ________ looking for the boy. Then, she saw her 6-year-old son on the stage. He was on the piano bench ________ Twinkle, Twinkle, Little Star.

The mother was very ________. Before she could get her son back, the famous pianist had ________ moved to the piano.

“Don’t move, son. ________ playing,” he said kindly to the boy. The great pianist reached down with his left hand and began filling in the bass (低音) part of the song. Soon, his right ________ reached around the other side. They played a________ piece of music. Together, the two impressed people with their music.

In all of our lives, we often receive helping hands---some we notice, and ________ we don’t. We also have lots of ________ to give helping hands---sometimes we want people to know, and sometimes we don’t. Little of ________ we all achieve comes without others’ help. So, when we receive, we should also give back.

1.A. force B. order C. warn D. encourage (鼓励)

2.A. bought B. sold C. donated D. raised

3.A. Because B. Before C. When D. Though

4.A. enjoyed B. stopped C. continued D. discovered

5.A. take B. start C. leave D. hold

6.A. still B. nearly C. also D. recently

7.A. playing B. singing C. writing D. listening

8.A. creative B. strong C. energetic D. surprised

9.A. safely B. slowly C. angrily D. quickly

10.A. Stop B. Spend C. Keep D. Manage

11.A. eye B. hand C. ear D. leg

12.A. difficult B. forgetful C. wonderful D. awful

13.A. other B. others C. the others D. another

14.A. races B. examples C. days D. chances

15.A. how B. which C. that D. what

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