单项选择题

A plastic wheel can be as tough as a metal one.

A．useful
B．tight
C．weak
D．strong
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单项选择题
We tried to restrict our conversation to arguments relevant to the topic.
A．put
B．suit
C．confine
D．resort
单项选择题
It doesn't stand to reason that he would lie.
A．seem logical
B．look pleasant
C．appear obvious
D．sound important
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