【題目】 is important to learn English well.
A.He
B.She
C.It

【答案】C
【解析】句意：學好英語重要。這是一個不定式作主語的句子，其基本結(jié)構(gòu)是：It's+形容詞+to do sth，即，用it作形式主語，代替句子后面的真正主語：動詞不定式。用且只能用代詞it代替不定式。故選C。

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