It takes about twelve minutes     and five minutes by bike.

A.walking        B.walk        C.to walk         D.walking

 

【答案】

C

【解析】

試題分析：本題的含義是步行需花費(fèi)12分鐘的時(shí)間，而騎自行車需要花費(fèi)5分鐘的時(shí)間，本題的主語it是形式主語，代替步行，真正的主語位于句尾，用動(dòng)詞不定式to walk，故本題選C。

考點(diǎn)：形式主語it和真正主語to do sth的使用。

點(diǎn)評(píng)：在英文中，當(dāng)主語是動(dòng)詞短語或主語過長(zhǎng)時(shí)，為了避免頭重腳輕，通常主語用it代詞，叫做形式主語，而真正的主語內(nèi)容位于句尾，用動(dòng)詞不定式，使句子使用更加方便和美化。

 

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