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This has made it necessary for industry very quickly. A.developing B.to develop

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This has made it necessary for industry very quickly. A.developing B.to develop

This hasmade it necessary for industry ________ very quickly.

A.developing

B.to develop

C.to have developed

D.developed

 

试题答案

答案:B

提示:

It是形式宾语,后面的to动词不定式是真正的宾语