.They were __________ to produce carbon,nitrogen,water and other gases.A．in time

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.They were __________ to produce carbon,nitrogen,water and other gases.

A．in time

B．at a time

C．at one time

D．on time

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举一反三

_______the fact that there was great prejudice against women entering men’s profession then, she succeeded as a manager of a big company.

A．While

B．In spite of

C．Despite of

D．As

题型：不详难度：| 查看答案

When the police appeared, the excited crowd surrounded them________all directions.

A．to

B．in

C．from

D．under

题型：不详难度：| 查看答案

They set off________a trip________London.

A．on; for

B．on; to

C．for; to

D．for; for

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You can’t become infected_______ HIV by swimming in a pool, or sitting in a bath.

A．to

B．of

C．with

D．at

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. His efforts to persuade him to make a donation were ____ because he showed no intention to take a cent out of his pocket.

A．in place

B．in sight

C．in vain

D．in effect

题型：不详难度：| 查看答案