"_____ your meeting is!" he offered them his sincere congratulations.

--- Don’t take pictures here, please. --- ______

 --- Sorry I’m late.--- _______ tell me the bus broke down again!

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

 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.