单项选择题

His ______ brain has worked away on the idea of a universal cure.

A．rich
B．quick
C．productive
D．fertile
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单项选择题
Share prices on the Stock Exchange plunged sharply in the morning but ______ slightly in the afternoon.
A．regained
B．recovered
C．restored
D．revived
单项选择题
The reception was attended by ______ members of the local community.
A．excellent
B．conspicuous
C．prominent
D．noticeable
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