单项选择题

He must have had an accident, or he ______ here then.

A. should be


B. would be
C. could have been


D. would have been
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We hadn’t met for 20 years, but I recognized her ______ I saw her.
A. for the moment

B. the moment when
C. at the moment when

D. the moment
单项选择题
______ from the hilltop, the lake scenery is beyond description.
A. To see
B. Having seen
C. Seeing
D. Seen
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