单项选择题

How the fire in the dancing hall started () a mystery.

A.to remain
B.remains
C.remain
D.is remaining

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单项选择题
--Can I help you --I' d like to have a()of China Daily.

A.piece
B.sheet
C.loaf
D.copy
单项选择题
--Sorry, but I must go and catch the plane now. --Can we () a time for another discussion

A.date
B.fix
C.make
D.prepare
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