单项选择题

It will be a great advantage to be able to speak a foreign language, especially if you are ______ business.

A．to
B．with
C．on
D．in
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单项选择题
It was Japan ______ launched the war against China.
A．that
B．when
C．whom
D．which
单项选择题
Not until I shouted at the top of my voice ______ me.
A．did she look at
B．that she looked at
C．she didn't look at
D．had she looked at
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