All of us find _____ necessary to take exercise every day.

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All of us find _____ necessary to take exercise every day.
A.this B.that C.it
We find _______ impossible to get there before 8 o' clock.
A.this B.that C.it
这两道题有什么不同?为什么前一道选B后一道选C?

Choose C.
这是一个句式 find it + adj. + to do, 意思是 "发现做...是adj.", 其中,it是形式宾语,代替的是后面to take exercise,这样做是为了平衡句子结构.
例如: I find it interesting to talk with him.(我发现和他聊天很有意思)
你的这句子意思是: 我们所有人都发现每天锻炼身体是很有必要的.
C
解析：句式find+it+adj．+to do.
再问：前一题答案是B。。是为什么？
再答： it吧。。。。。。

All of us find _____ necessary to take exercise every day. All of us find____ necessary to take exercise every day.A.th all of as find ___necessary to take exercise every day 1.It is necessary for all of us to take exercise every morni ( )we all found ____it necessary to take some exercise every it is good for us to take exercise every day ( ) is necessary for us to take one hour's exercise every da Most students find ______ necessary to study hard every day to take medicine on time is necessary every day 1.___ is important for all of us to take exercise. I thought_____very important to take exercise every day i think it is ()to take some exercise every day