单项选择题

You ______ a tip if you're not satisfied with the service.

A．mustn't leave
B．must leave
C．can leave
D．don't have to leave
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单项选择题
Every society has its own peculiar customs and ______ of acting.
A．ways
B．behavior
C．attitudes
D．means
单项选择题
Those who spend a lot of time with children may be aware of the difference in the way boys and girls respond to ______ situations. A. alike B, same C. likely D. similar
A．likely
B．similar
C．B, same
D．Those who spend a lot of time with children may be aware of the difference in the way boys and girls respond to ______ situations.
E．alike
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