单项选择题

（）we have finished the course, we shall start doing more revision work.

A.Fornow
B.Nowthat
C.Eversince
D.Bynow

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单项选择题
Since the new technology was introduced last month, we（）in speeding up production.

A. succeed
B. succeeded
C. have succeeded
D. will succeed
单项选择题
Perhaps the day will come（）our city will be without any pollution.

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