单项选择题

He looked behind him to （）he was not being followed.

A. believe
B. find
C. make sure
D. look

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单项选择题
There was nobody （） when we came round the corner.

A. out of sight
B. at sight
C. by sight
D. in sight
单项选择题
Soon he got （） his difficulties and succeeded.

A. across
B. away
C. over
D. through
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