---He seems to be lost in thought. Why?
---Because the film _____ his memories of his childhood.
---Why do many people keep dogs as pets?
---Because they are our ______ friends and they never desert their masters.
--Your mum is very kind.
--Yeah, My mum is pretty considerate, you know what ,she always arranges everything around me.
-Isn’t that your teacher over there?
-No, it ______ be him. I’m sure he doesn’t wear glasses.
---Go for a trip after the exam, OK?
--- ______. I love getting close to nature to relax.
---Tom wants to be another Obama after he graduates from school.
---That sounds great, but how can he ____ a person like him if he goes on like this?
---Have you seen my English notebook?
--- Oh, Jane must take it _____; she has the same one as yours.
--- Why are the Woods selling their belongings?
--- They to another city.