题目内容

Until recently, some of developing countries sold tobacco only through government monopolies, with little or no attempt ________ persuasion.

A. to
B. on
C. against
D. at

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Some shoppers looked bewildered by the sheer variety of goods ________ offer.

A. for
B. from
C. on
D. below

There was no one nearby who might see him trying to ________ the house.

A. break through
B. break down
C. break out
D. break into

The college is not able to ________ because of restrictive planning laws.

A. explode
B. explore
C. expose
D. expand

The university has ________ a research center to develop new ways of combating bacteria which have become resistant to drug treatments.

A. launched
B. submitted
C. revealed
D. generated

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