----YououghttohavemadeanapologytoMarylastnight.----Yes,...

問題詳情：

----You ought to have made an apology to Mary last night.

----Yes, I know I ____.

A. ought to        B. have to          C. should have       D. must have 

【回答】

知識點：虛擬語氣與情態動詞

題型：選擇題