单项选择题

They talked in a low voice（）heard by the man standing against the wall.

A. so as to not be
B. as to be not
C. so not as to be
D. so as not to be

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单项选择题
He couldn’t handle such a delicate situation, and（）

A. no more could I
B. could no more I
C. I could no more
D. could I no more
单项选择题
Why does Fred prefer to use the tram（）

A. They are faster.
B. It is the only thing available.
C. Buses are not safe.
D. Buses are too crowded.
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