whenhehasgone能选?50.Couldyoutellm
50.ould you tell me_____? A.when he has gone B.why did you look worried? C.what's wrong with your leg? D.whom are you looking for? 答案给的C，A项可以选吗？为什么
这道题的答案只能是C。 when 所引导的从句应该是一般过去时态。其他两个句子的语序为疑问形式，也是错误的。