单项选择题

It is necessary that the students ______ more exercises to do.

A．have
B．must have
C．will have
D．can have
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You've got it on the ______.
A．knot
B．bottleneck
C．button
D．right
单项选择题
Some people don't like the pop songs because they can't ______ so much noise.
A．resist
B．sustain
C．tolerate
D．undergo
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