单项选择题

I（）a taxi when it was raining.

A. used to take
B. used to taking
C. used to be taking D. was used to taking

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单项选择题
It would seem to be a general truth（）nothing is as straightforward as it at first seems.

A. that
B. when
C. because
D. if
单项选择题
A storm buried Illinois under several inches of snow Tuesday,（）at least 100 people dead in traffic accidents.

A. to leave
B. leave
C. left
D. leaving
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