题目内容

The shortage of fuels ___ (导致) the need for an economical engine.

A. generates
B. incurs
C. results in
D. gives rise to

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Recent research ___ (证明) that Jackson’s theory of economic development is flawed.

A. tested
B. certified
C. demonstrated
D. confirmed

The writer of the article ___ (阐明) his opinion very clearly and reasonably.

A. exposed
B. clarified
C. illustrated
D. expounded

There are several ways to avoid the probability of serious pest attacks, or at least ___(降低) their impact.

A. diminish
B. lessen
C. relieve
D. degrade

This area has ___ (获得) little attention from researchers at home.

A. captured
B. invited
C. reached
D. aroused