Mrs. Green has a cute baby. It often smiles at you ______.
useful robot! It can help with the housework like a human servant.
It’s reported that there are more than 300 smokers in China, nearly a third of all the smokers in the world.
— May I watch TV now, mum?— No, you . You must clean your room first.
Mary used to in the countryside, but now she is used to in the city.
WeChat (微信) is very popular. the young the old are getting interested in it.