单项选择题

We live in a time______, more than ever before in history, people are moving.

A. what
B. when
C. which
D. where
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单项选择题
With all this work on hand, she______to the dance party last night.
A. oughtn't to go
B. hadn't gone
C. shouldn't have gone
D. mustn't have gone
单项选择题
We were______for half an hour in the traffic and so we arrived late.
A. kept up
B. held up
C. cut up
D. brought up
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