It is necessary something to protect our environment.A. doB. to doC. doesD. doing

发布时间：2020-08-22 07:48:31

It is necessary      something to protect our environment.
A. do
B. to do
C. does
D. doing

网友回答

A. do
(答案→)B. to do
C. does
D. doing
解析：此题重点考查固定句型，It is+形容词 for sb. to do sth,“表示做某事对某人来说很adj”在这个结构中，it是形式主语，真正主语是后面的不定式短语，因此排除A、C、D故选B
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