are you still here?you were here half an hour ago.who __for?

问题描述:

are you still here?you were here half an hour ago.who __for?
a.were you waiting
b.are you waiting
c.do you wait

B !
因为这个人正在问问另外一个人问题,看前面那一句就知道了.
选C是绝对错的~