单项选择题

Exceeding speed limits and ______ safety belts are two common causes of automobile death.

A．not having worn
B．not to wear
C．failing to wear
D．don't wear
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单项选择题
The naughty boy has cried wolf time and again. Hardly ______ believes him when he says he really is in trouble.
A．nobody
B．somebody
C．some one
D．anybody
单项选择题
The scheme to promote the economic development on the small island will be strictly ______ no matter what may happen.
A．occupied
B．conquered
C．executed
D．crystallized
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