【題目】I think it is a good idea _________ parents to do something instead.
A.to help
B.helps
C.helping
D.help

【答案】A
【解析】考查動詞不定式作真正的主語,形式主語是it,結(jié)構(gòu):It is+名詞短語+to do sth.;句意:我想幫助父母來做些事情來代替是一個好的想法。故選A。

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