单项选择题

I remember ______ to help us if we ever got into trouble.

A. once offering
B. him once offering
C. to offer him
D. him to offer
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单项选择题
He is ______ of an actor.
A. anybody
B. anything
C. somebody
D. something
单项选择题
The secret agent kept looking back because he was afraid of ______.
A. followed
B. being followed
C. having followed
D. having been followed
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