2016届高考英语二轮复习阅读理解一百四十集选练：（27）_高考复习指南

　　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.

　　BDC

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