单项选择题

The Johnsons must have been out, （）there is no light which can be seen in their house tonight.

A. for
B. because
C. since
D. as

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单项选择题
If you （）that late movie last night, you wouldn't be dozy now.

A. haven't watched
B. didn't watch
C. hadn't watched
D. wouldn't have watched
单项选择题
That（）the case, how can you expect to get everybody moving

A. is
B. has been
C. being
D. was
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