________isimportanttomasteratleast

发布时间:2020-07-27 10:58:25

________ is important to master at least a foreign language in modern times especially after China’s entry WTO.A.ThatB.WhatC.ThisD.It

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D解析本句子的真正主语是to master…,it在此作形式主语。形式主语或形式宾语只能用it。
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