单项选择题

The example of the twins going to a university and to a factory separately shows()

A. the importance of their intelligence
B. the role of environment on intelligence
C. the importance of their positions
D. the part that birth plays

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单项选择题

What’s the main idea of the third paragraph()

A. Gene technology can help people to give birth to a baby.
B. Gene technology can be used to clone human babies.
C. How gene technology can be used to treat hereditary diseases.
D. Gene technology can solve all the problems of the English imperial family.

单项选择题

不同的一项（）

A. announce
B. amaze
C. advantage
D. able