单项选择题

We should be cautious in crossing a crowded street.

A．careful
B．intelligent
C．quiet
D．weary
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单项选择题
Thus our conviction is reinforced that only social revolution can really solve the problems of the people.
A．argument
B．belief
C．proposal
D．theory
单项选择题
If you have any complaint please see the manager.
A．protest
B．criticism
C．suggestion
D．fault
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