I don't think _________ possible to master a foreign language without much memory work.

A．this

B．that

C．its

D．it

 

【答案】

D

【解析】本题考查it的用法。正确答案为D项，it是形式宾语，真正的宾语是后面的不定式短语。而其它三项都没有此种用法。

 

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