单项选择题

The ground is wet. It ______have rained last night.

A. must
B. can
C. should
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单项选择题
How long has Mr. Wang been here
A. He arrived here three hours ago.
B. He’s been here for an hour.
C. He came here half a hour ago.
单项选择题
—Which would you like, rice or noodles —______ is OK. I’m hungry.
A. Either

B. Neither
C. Both
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