题目内容

Setting up separate bicycle tracks is an effective way to _______ bicycle accidents and improve the safety for riders who share the road with motor vehicles.

A. curb
B. clip
C. surge
D. solve

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In the last two decades world production of electricity has roughly doubled, with the developing nations _______ the developed.

A. surging
B. overtaking
C. hauling
D. reversing

Language and culture are closely related with each other, and the understanding of one requires the understanding of _______.

A. other
B. another
C. the other
D. some other

The boss was in a temper. Do you know _______ made him so angry?

A. what was it
B. what it was that
C. what it was
D. what was it that

The pumpkin was known in North America and South America 5,000 years ago but it _______ in North America for over 8,000 years according to some researchers.

A. may have been grown
B. will have been grown
C. would have been grown
D. should have been grown

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