----It’s traditional in China to firecrackers on Spring Festival. ----But the serious smog(雾霾)nowadays needs us to stop it.
Soon she __________ swim a quarter of a mile.
The little girl painted one side of the paper green but _________ side black.
There are _________ students in the classroom. Can you tell me where they are?
Tom’s mother was ill___ hospital so he was ____ hospital to look after her.
― I never __________ him after he went to the USA. ―Maybe you should write to him first. A. hear about B. hear of C. hear fromD. hear out