单项选择题

Robert is said ______abroad, but ! don't know what country he studied in.

A．to have studied
B．to stay
C．to be studying
D．to have been studying
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单项选择题
They are all very tired, but ______of them would stop to take a rest
A．any
B．some
C．none
D．neither
单项选择题
—Who is Jerry Cooper —______ I saw you shaking hands with him at the meeting.
A．Don't you meet him yet
B．Hadn't you met him yet
C．Didn't you meet him yet
D．Haven't you met him yet
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