单项选择题

Please return the notice to me（）due time.

A.at
B.on
C.of
D.in

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单项选择题

Please return the copies attached（）your signature.

A.of
B.on
C.from
D.with

单项选择题

Please report your position 4 hours（）advance.

A.at
B.for
C.in
D.to

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