单项选择题

In this experiment, they are woken up several times during the night, and asked to report what they ______.

A. had just been dreaming
B. are just dreaming
C. have just been dreaming
D. had just dreamt
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单项选择题
The old man seems ______ here for more than twenty years.
A. to be living
B. to have lived
C. to have been lived
D. to live
单项选择题
—My goodness! I've just missed the train. —That's too bad. I am sure you ______ it, if you had hurried.
A. could have caught
B. had caught
C. would catch
D. could catch
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