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

问题详情：

— 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

知识点：动词时态

题型：选择题