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

問題詳情：

— Come and join us, Betty!

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

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

【回答】

A

知識點：動詞時態

題型：選擇題