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
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
问题解答：
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