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【单选题】

Excuse me, would you mind _______ your voice down, please?
[ ]

A.
to keep
B.
keeping
C.
keep
D.
kept
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参考解析:
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举一反三

【单选题】I have two rooms _,but I can't decide______. [ ]

A.
to live in, to choose which one
B.
lived, choose which one
C.
to live in, which one to choose
D.
to live in, which one