—Comeandjoinus,Ben!—I’mafraidIcan’t.I’mtoobusynow.IfI

問題詳情：

— Come and join us, Ben!

— I’m afraid I can’t. I’m too busy now. If I _______ time, I would certainly go.

A. had              B. will have        C. have had      D. have

【回答】

A

知識點：動詞時態

題型：選擇題