单项选择题

The population in China ______ reduced in recent years.

A．have been
B．is
C．has been
D．are
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单项选择题
It is difficult to ______ the church box without donating some money.
A．pass away
B．pass by
C．pass over
D．pass out
单项选择题
The policemen ______ in large numbers on the scene when there was a murder.
A．turned up
B．turned on
C．turned out
D．turned over
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