Food safety is important. Rules _____ to stop people from food pollution.
—Will you go shopping tonight ? --If you go , ________.
I enjoy the popular dance “hip--hop” , but ______my father _______ my mother like it .
31. It’s two weeks since we _______ the work in Beijing Ren’ai Education Institute .
I sit in front of the classroom _______ hear the teacher clearly .
You are _______ twenty—two . You should have more test .