单项选择题

You may not go out to play games () you have finished your work.

A.as
B.while
C.until
D.when

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单项选择题
Mary was () to school when she saw the accident.

A.on her way
B.in her way
C.by her way
D.in a way
单项选择题
When () again When he () , I'll let you know.

A.will he come, will come
B.will he come, come
C.he comes, will come
D.will he come, comes
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