__ is necessary _ us ______l...

______ is necessary _______ us ________learn English well.

A．It, of, to

B．This, of, of

C．It, for, to

D．This, for, to

C 【解析】考察固定句型 It is +adj+for/of sb to do sth 当adj是人的一种品格时用of。题目中necessary不是人的品格，故选C 句意：对我们来说学好英语是很有必要的。

考点分析：

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______ is necessary _______ us ________l...