题目内容

She learned the rules of the game step ______ step.

A. in
B. by
C. on
D. off

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Have you decided ________ where to go?

A. on/upon
B. in
C. off
D. of

Will the fine weather keep ______?

A. on
B. up
C. off
D. in

______ some extent you’ve done a good job.

A. On
B. Off
C. In
D. To

玩的开心

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