【題目】It is necessary for us good habits in our daily life.
A.keep
B.to keep
C.keeping

【答案】B
【解析】句意:養(yǎng)成好的習(xí)慣在我們的日常生活中是有必須要的。It is+adj.+for sb.to do sth.是固定搭配,意為“對(duì)某人來(lái)說(shuō)做某事是……的”。此時(shí)的不定式是真正的主語(yǔ),it是形式主語(yǔ),故選B。

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