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4.This problem is too hard for us to solve.(改为同义句)

This problem is        hard         solve it.

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 The famous scientist and thinker,Charles Dar?win,was born on February 12,1809. His family lived not far from the River Severn England.

  Charles's father was a well-known doctor and the son of a still greater doctor and scientist. Charles's father hoped that his son would also become a doctor.

  As a boy,Charles liked to go for walks in the fields and forests. He watched nature,and compared what he saw with everything he had read in science books. He also liked collecting very much. He collected many things,such as birds,eggs,stones and leaves. His father did not like this, as Charles was not studying very well at school.(1)为了成为一名医生,十六岁时达尔文就被送到爱丁堡大学(Edinburgh University) 学习。But he was interested in the history of nature.

  Then he was sent to study in Cambridge Uni?versity. There he studied until 1831.

  Some time later he heard that the ship Beagle was going on a trip to South America and wanted a scientist. His professor advised him to go. He said the trip would be just for Darwin. So when the ship leftEnglandin December,1831,Darwin was on it. The research lasted almost five years. The Beagle studied the waters in the sea near South America. It also visitedNew Zealand,Australiaand islands in the Pacific. Darwin saw many new plants and ani?mals. He collected all kinds of plants.

  In 1842 Darwin went to live inKent, where he continued his studies of change in nature. ② Darwin understood that plants and animals are not always the same,and that they really change.

          By 1859 Darwin had finished his famous book "The Origin of Species".It made a great hit in the world of science.

   ③He was opposed (反对) by the church and even by some scientists. But later,more and more scientists agreed with him.

  Darwin continued his studies in science until he died in 1882.

根据短文内容,回答下列问题。

21.Why didn't Charles become a doctor?

22.When did Charles start the research with the Beagle?

23.请将①处画线句子翻译成英语。

24.请将②处両线句子翻译成汉语。

25.请改写下句,使其意思与文中③处画线句子一致。

The church and even some scientists        him.

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