1.According to the first paragraph,______ .

　　　A. man-made evolution has improved all species

　　　B. man-made evolution has weakened some species

　　　C man-made evolution can make up for all natural losses

　　D. natural evolution won’t happen without man’s assistance

　　2. What does the underlined part “taken a back seat to” in Paragraph 2 mean?

　　　A. Become powerful assistance to.

　　B. Become a huge barrier to.

　　　C Speeded up the process of.

　　D. Played a less important role than.

　　3 What does the third paragraph mainly talk about?

　　　A. Why natural evolution happens so slowly.

　　　B. The way scientists adopt to have genetic defects repaired.

　　　C. The advantages of man-made evolution over natural evolution.

　　D. How scientists make use of man-made evolution to create new species.—3、BDC

　　【阅读理解】介绍说明类

　　阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。

　　While some dictionaries define the word “right” as “a privilege” when used in the context of “human rights”, we are talking about something more basic. Originally, people had rights only because of their membership in a group, such as a family. Then, in 539 BC, Cyrus the Great, after conquering the city of Babylon, did something totally unexpected—he set all slaves free and let them return home. Moreover, he declared people should choose their own religion. Cyrus’ statements are about the first “human rights” declaration in history.

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