1.Ask him hou much ____.
A:did the suit cost B:cost the suit C:the suit cost D:the suit costed
应该选A
Ask him how much did the suit cost.
问他那西装花了钱.（how much 后面要加did,verb也就是did cost）
选C doesn't make sense
因为那个人已经买了西装了 所以did cost(花了 英文很specific)
这种题做多了就知道了 规律是固定的
在给你举个例子:
Ask the teacher how much did the books cost?
问老师那些书画了多少钱?
在这里 verb也是did cost