单项选择题

Help me! Don’t just look ______ while I’m trying to lift the sack.

A. up
B. in
C. on
D. at
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单项选择题
The reason for the traffic accident was ______ one of the drivers lost control of his car.
A. why
B. when
C. that
D. because
单项选择题
I didn’t go to the park, but I do wish I ______ there.
A. would be
B. had been
C. would have been
D. have been
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