3． —Come and join us，Jimmy !

题目：3． —Come and join us，Jimmy !

—I-m sorry，but I-m really busy now．lf I _______ time，l would certainly go．
A． will have
B． have had
C． had
D． have

喵查答案：C

3.C【解析】由“我现在很忙”及主句谓语是“would+ 动词原形”推知，if从句应用虚拟语气，表示与现在的事实相反，从句谓语动词应用过去时。故答案为C。