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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They only have a limited amount of time to get their points across.()

A. large
B. total
C. small
D. similar
单项选择题
He was a very cute boy but now he seems to have no interest in anything.
A. clever
B. honest
C. brave
D. dull
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