题目内容

Doctors found that the lungs of the children whose mothers smoked______.

A. had developed as fast as they should
B. had not developed as fast as they should
C. had not developed at all
D. had developed faster than they should

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How many times have the doctors tested the children for five years？

A. Ten times.
B. Five times.
C. Once.
D. Twice.

【B5】

A. need
B. needed
C. dare
D. dared

【B6】

A. of
B. against
C. for
D. with

What are they talking about？

A. The heater of this room.
B. The cold weather.
C. Long working hours.