题目内容

-Mum, can I go to the zoo with Jack? -When your homework___, you can.

A. is done
B. was done
C. does
D. did

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Twenty-year-olds should not____ to drive in China.

A. allow
B. be allow
C. be allowed
D. allowed.

Seeing him rush into the room with tears in his eyes, I asked him what___.

A. would happen
B. had happened
C. happened
D. was happened.

China’s sports stars Yao Ming and Liu Xiang ___Good Will Ambassadors(亲善大使)for Shang hai.

A. has been named
B. have been named
C. has named
D. have named.

The earth is our home. It ___well.

A. must be protected
B. should protect
C. need protect
D. should protected.