Before __ the trunk must be checked.A．usedB．to useC．being usedD．to be used

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Before __ the trunk must be checked.

A．used

B．to use

C．being used

D．to be used

答案

解析

略

举一反三

I want to be left alone ___ things out.

A．think

B．thought

C．thinking

D．to think

题型：不详难度：| 查看答案

3．_________last year, the number of people traveling this holiday weekend is expected to increase slightly.

A．Being compared to	B．Comparing to
C．Compared with	D．Comparing with

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11．Nowadays electrical energy_________from the sun has become the most widely used energy.

A．comes

B．coming

C．to come

D．Came

题型：不详难度：| 查看答案

18．_________a US visitor visa twice, the old couple finally gave up their hope of going to America to experience Thanksgiving Day.

A．Having been refused

B．Being refused

C．Having refused

D．To be refused

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. He is rather difficult to makefriends with, but his friendship, ____, ismore true than
anyother.

A．once gained

B．when to gain

C．after is gained

D．while gaining

题型：不详难度：| 查看答案