题目内容
It is vital that we should learn English well.
(用动词不定式改写,句意不变)It is vital ________ ________ ________ ________ English well.
答案:for;us;to;learn
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题目内容
It is vital that we should learn English well.
(用动词不定式改写,句意不变)It is vital ________ ________ ________ ________ English well.