these pipes should be galvanised before installing.怎么改错?
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these pipes should be galvanised before installing.怎么改错?
these young trees should() A.be taken care B.be taken care of 选哪个,为什么?
you should follow these sentence patterns to make new sentenceyou should these sentence patterns to make new sentence.Acopy B.rewrite C.follow D.recite 选C为什么选C(在should后面)
You should do more of these.
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The board deemed it urgent that these files__right away.A had to be printed B should have been printed C have been printed D be printed