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
The bar in the club is for the ______ use of its members.
A. extensive
B. exclusive
C. inclusive
D. comprehensive
单项选择题
The heat in summer is no less （）here in this mountain region.

A. concentrated
B. extensive
C. intense
D. intensive
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