单项选择题

（） is the question of using existing resources to produce original and benefi cial solutions, ideas or products.

A．Creativity
B．Productivity
C．Application
D．Combination

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单项选择题

There has been an increase in attendance at lectures （） by the World Affairs Council, which brings international issues to public attention.

A．developed
B．sponsored
C．advanced
D．promoted

单项选择题

Man may destroy the balance of nature, but from time to time, nature takes a ter rible （）.

A．attack
B．threat
C．lesson
D．revenge

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