A.Bob had walked fartherB.if Bob should walk farther C.had Bob walked fartherD.if Bob walked fartfer

熱心網友

C很明顯后邊的是迷惑你!看豆號前!還記得虛擬語氣的倒裝嗎!提前謂語動詞

熱心網友

C

熱心網友

C

熱心網友

選C，虛擬語氣結構

熱心網友

had Bob walked farther=if Boh had walked farther

熱心網友

C.虛擬語氣的倒裝結構。

熱心網友

c I'm sure

熱心網友

C

熱心網友

D

熱心網友

C 為虛擬語氣，對過去的虛擬，有前句可得