C
should not have laughed可知这是对过去事实的假设，因此if引导的条件状语从句用过去完成时。故选C。
考点：
1年前
5
I should not have laughed if I _________ you were serious. A
1个回答
相关问题
-
I should not have laughed if I________you were serious.
-
I should not have laughed if I
-
Please be serious. I am not _______. You should consider it
-
Speaker A:If I were you ,I would have accept the job.
-
If there were no _____examination,I should have ___much happ
-
If I were you,I ___ worry so much.A could not B must not C w
-
If I were you,I wouldn't do that,because you should know abo
-
＿＿,I would go there myself .A.Were I you B.I were you C.If I
-
i suppose you are not serious,__?
-
i might change my mind.if i have a serious relationship.这个是虚