单项选择题

For a long while he waited, not daring to descend from his hiding place ______ they should come out and catch him in the act.

[A] when
[B] lest
[C] that
[D] where
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单项选择题
The thieves ______ the waste paper all over the room while they were searching for the diamond ring.
[A] spread
[B] scratched
[C] scattered
[D] burned
单项选择题
______ no further business, the Chairman closed the meeting.
[A] There is
[B] There was
[C] Being
[D] There being
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