单项选择题

It is（）for all motorcyclists to wear helmets according to the new regulation.

A.optional
B.compulsory
C.voluntary
D.secondary

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单项选择题
It is important to（）strict restrictions on publishing writings nowadays.

A.repose
B.impose
C.expose
D.dispose
单项选择题
The deeper you go into the novel，the more you begin to understand and（）with the characters.

A.sympathize
B.concentrate
C.demonstrate
D.maximize
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