----It’s traditional in China to firecrackers on Spring Festival.----But the serious smog(雾霾)nowadays needs us to stop it.
When is the best time ______ China?
Five million, five hundred and fifty-two thousand, three hundred and thirteen is _________.
About _____ of the students in Grade Eight this year were born in the ______.
While mother ____ some washing, I ___ a kite for Kate.
Sally found a snake. She asked her father to _____ and threw it away.