单项选择题

They ______ never ______ each other since they met last.

A. had; seen
B. did; see
C. have; seen
D. have; saw
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______ very late, we took candles and went upstairs.
A. It was
B. It being
C. It is
D. It gets
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This new building __ by the end of this year.
A. will put up
B. will put on
C. will be put up
D. had been put up
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