问题
选择题
— 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
答案
答案：A
句意：本，来加入我们吧！——恐怕我不能。我现在太忙。如果我有时间，我一定会去的。结合语境可知条件状语从句中描述的是与现在相反的事实，故条件状语从句中用一般过去时态，选Ａ。