单项选择题

It ______ around nine o'clock when I drove back home because it was already dark.

A. had to be
B. was to be
C. must have been
D. must be
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单项选择题
There are no seats ______ for those who are late for the show.
A. available
B. enough
C. supplied
D. make
单项选择题
______ to speak when the audience interrupted him.
A. Hardly had he begun
B. No sooner had he begun
C. Not until he began
D. Scarcely did he begin
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