单项选择题
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
单项选择题 -Would you like to see the menu? -（）
单项选择题 All the team members tried their best. We lost the game,（）.
单项选择题 He is the man （）dog bit me.
