单项选择题

Almost all economists agree that nations gain by trading with one another.

A．work
B．profit
C．rely
D．prove
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单项选择题
The company recommended that a new gas station be built here.
A．ordered
B．insisted
C．suggested
D．demanded
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
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