we found it necessary to protect the earth 为什么用it 而不是it is

we found that和 we found it We found it diffcult ( ) [finish] the work on time . We found the key _____ she lad left it.为什么? We found it difficult _______ there on time.(get toget 帮我分析下下面几道题目.3Qwe consider _it_ absolutely necessary that we should open our door to the outside worldA.that is B.it being C.it D.what is我选了A,可是答案是C.后面的重句不看直接看we consider __ absolutely necessar We found that it was very useful to learn English well.同义We found ___to learn English well. we found it necessary to protect the earth 为什么用it 而不是it is 英语翻译1.We flushed a covey of quail under a high clay bank with overhanging brush and I killed two as they went out of sight over the top of the bank.Some of the covey lit in trees,but most of them scattered into brush piles and it was necessar We all found ( it ) very interesting to eat.为什么要用it? We all found ( ) interesting to play the game.A:it B:this C:it's we found love We found it very useful to learn English well.(变为同义句) We found [ ] necessay to protect the environment.A it B this C that D what 翻译这句:We all found it hard to get along with her at first. we found our english teacher very interesting,it's structure is（） we all found _____ very interesting to play chessit is that it that is We all found ____ to play the gameit interesting 还是it's interesting为什么 we have to found somebody ______(其他）to do it.