单项选择题
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
How the fire in the hotel started ______ a mystery.
A.remain
B.to remain
C.remains
D.is remaining
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单项选择题
A.some thingsB.anythingC.thingsD.nothing
A.some things
B.anything
C.things
D.nothing
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单项选择题
How many pieces of advice does the writer give us
A.Three.
B.Two.
C.One.
D.Four.
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