They devote themselves to __ a new way to make populated water clean.A．findingB．

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They devote themselves to __ a new way to make populated water clean.

A．finding

B．look for

C．find

D．having found

答案

解析

略

举一反三

He has a poor memory.He has forgotten ___ his dictionary while reading.

A．carrying

B．taking

C．bringing

D．to bring

题型：不详难度：| 查看答案

She could do nothing but __.

A．cry

B．to cry

C．crying

D．cried

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___ an answer, I wrote to him again.

A．Having not received

B．Not having received

C．Not receiving

D．Did not receive

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Instead of you ___ on me. I should wait on you.

A．wait

B．waited

C．waiting

D．be waited

题型：不详难度：| 查看答案

It’s a bad habit to sleep with all the windows ___.

A．close

B．closed

C．closing

D．to close

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