单项选择题

Since last century, his family ______teachers.

A. are
B. are being
C. have been
D. were being

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单项选择题
I ______an old friend on the way home yesterday.
A. meet
B. met
C. have met
D. had met
单项选择题
If he ______to the gate last night, I would have given him the letter.
A. would come
B. comes
C. had come
D. come
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