单项选择题

Sentence Completion
According to one optimistic hypothesis, the dense concentration of entrepreneurs and services in the cities would incubate new functions,（）them, and finally export them to other areas, and so the cities, forever breeding fresh ideas, would （）themselves repeatedly.

A．immunize...perpetuate
B．isolate...revitalize
C．foster...deplete
D．spawn...imitate
E．nurture...renew

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单项选择题

There are any number of theories to explain these events and, since even the experts disagree, it is（）the rest of us in our role as responsible scholars to （）dogmatic statements.

A．paradoxical for...abstain from
B．arrogant of...compensate with
C．incumbent on...refrain from
D．opportune for...quarrel over
E．appropriate for...issue forth

单项选择题

OPULENCE:（）

A．transience
B．penury
C．solitude
D．generosity
E． transparency

Sentence Completion According to one optimistic hypothesis, the dense concentration of entrepreneurs and services in the cities would incubate new functions,（）them, and finally export them to other areas, and so the cities, forever breeding fresh ideas, would （）themselves repeatedly.

Sentence Completion
According to one optimistic hypothesis, the dense concentration of entrepreneurs and services in the cities would incubate new functions,（）them, and finally export them to other areas, and so the cities, forever breeding fresh ideas, would （）themselves repeatedly.