2017届英语一轮精品复习导学案：Unit3《Science versus nature》（译林牛津版必修5）_高考复习指南

　　1. DNA cloning has been done for over

　　years.

　　A. 5

　　B. 10

　　C. 15

　　D. 20

　　2. Which of the following is reproductive cloning?

　　A. Doctors have created a new liver from a single gene.

　　B. A cat born in a laboratory looks exactly like its mother and has the same DNA.

　　C. The cure for a deadly disease has been discovered by using a human embryo.

　　D. A person’s cancer is cured.

　　3. Which type of cloning is illegal in most countries?

　　A. DNA cloning and reproductive cloning

　　B. DNA cloning and therapeutic cloning

　　C. reproductive cloning and therapeutic cloning

　　D. reproductive cloning

　　4. People worry about cloning because

　　A. it can be used for transplants

　　B. it may cause cancer

　　C. it goes against natural birth

　　D. they do not like the idea

　　5. According to the article, the main problem with cloning is

　　A. that people do not know there are three different types

　　B. that many clones walk around

　　C. what scientists choose to use it for

　　D. that the technology is too advanced

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