单项选择题

______ what to do, the man telephoned the police.

A) Not known
B) Not knowing
C) Don't know
D) Knowing not
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单项选择题
______ surprised me most was to see some of the villagers seated on the benches in the corner.
A) What
B) Which
C) That
D) It
单项选择题
Jane ______ as soon as she recognized it was her former boy friend's voice.
A) called up
B) waited on
C) took up
D) rang off
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