单项选择题

"Larry, I can’t give you an answer ______ I think it over," said Joe.

A. when
B. before
C. after
D. until
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单项选择题
None of the books and magazines can be ______ from the reading room.
A. taking away
B. taking off
C. taken away
D. taken back
单项选择题
It was about 600 years ______ the first clock with a face and hour hand was made.
A. that
B. until
C. before
D. since
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