___ progress you have made this term!

__________at the door before you enter the office，or you’ll be considered impolite

______ ways to get on well with your classmates, or you will make yourself very lonely.

    for the boy to talk with his mouth full!

 That hazy（雾霾）weather has hit 104 cities in middle-east China lately makes citizens well aware of ______a terrible problem China is faced with.