单项选择题

Prof. Varian's reputation has been greatly______ by the success of his new book.

A．enhanced
B．enlarged
C．heightened
D．unfolded
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单项选择题
There is no easy solution to Japan's labor______ which limits the country's economic development
A．friction
B．vacancy
C．rarity
D．shortage
单项选择题
The American dream is most______ during the periods of productivity and wealth generated by American capitalism.
A．plausible
B．patriotic
C．primitive
D．partial
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