Come and join us,Jimmy!I'm sorry ,but I'm really busy now.If I _____time,I would certainly go.A.will have.B.have had C.had.D.have

问题描述:

Come and join us,Jimmy!
I'm sorry ,but I'm really busy now.If I _____time,I would certainly go.
A.will have.B.have had C.had.D.have

这是if条件虚拟句,主句用过去将来时,从句用一般现在时 选d