单项选择题

There are no lights on and no one answer the doorbell. They（）be at home.

A. must not
B. will not
C. should not
D. can not

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It sounded（）down the rail.

A. as a train running
B. like a train to run
C. like a train running
D. as if a train running
单项选择题
Would you prefer to stay in a private or public（）in the hospital

A. cell
B. ward
C. chamber
D. suite
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