单项选择题

The background music in an assembly line is designed ______.

A．being not listened to
B．not being listened to
C．to be not listened to
D．not to be listened to
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单项选择题
If businessmen are taxed too much, they will no longer be motivated to work hard, with the result that government tax revenues might actually ______.
A．delay
B．disperse
C．shrink
D．sink
单项选择题
The conference will ______ as soon as the chairman arrives.
A．disperse
B．commence
C．descend
D．complete
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