Can you tell me something about your school rules—Well, We are told ______anywhere. It’s our duty to keep our school clean and tidy.

Mao Dun is Cindy’s favourite writer. He died in 1981, _____ his works are still popular today.

In class , our teachers always stand______ us in order to hear us clearly.

These boxes ______ for keeping the food clean andcool.

I really show my appreciation to my parents, under ________ financial umbrella I have started my own business.