Food safety is important. Rules to stop people from food pollution.
--- Do you know the woman ____ is walking on the other side of the street?--- Oh, that’s my history teacher.
The air in Xuzhou is much worse than that in many other cities.We must do______to protect our environment.
Remember to return the book to the library when you finish_____it.
---How’s Bob now ?---I hear the company _____him a very good job, but he turned it down.
The boy didn’t sleep well last night because of the ________from the factory.