I don’t have to introduce him to you ________ you know the boy..A.until B.unlessC.sinceD.but-九年级英语

题目简介

I don’t have to introduce him to you ________ you know the boy..A.until B.unlessC.sinceD.but-九年级英语

题目详情

I don’t have to introduce him to you ________ you know the boy..
A.until B.unlessC.sinceD.but
题型:单选题难度:中档来源:不详

答案

C
当从句中有since+一般过去时,主句用现在完成时,故选C

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