---There is somebody knocking at the door. Who________ it be?---I’m not sure. It ________ be a postman.
Suddenly he came in and said he had ____ to tell the class.
--- Have you seen ________ film Where are We Going, Dad? ---Yes, it's ________ interesting film!
Li Ying used to _______playing the piano, but now she gets used _______the violin.
There are __________ people shopping in the new supermarket, because it is on sale.
---Tim,how do your parents like pop music? ---___________ my dad ___________ my mom likes it.They both prefer classical music.