单项选择题

The government must take some measures ______ the city's pollution.

A．to control
B．controls
C．controlling
D．to be controlled

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单项选择题
I'd like to buy a house--modern, comfortable, and ______ in a quiet neighborhood.
A．in all
B．above all
C．after all
D．at all
单项选择题
John got the first prize in the Math contest, ______ made his parents very happy.
A．what
B．which
C．that
D．this
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