He________go out with his parents,but now he________staying at home alone.A.used to;is used toB.is used to;used toC.use to;is used to
I know the ________of the bird because it's one of the________ birds in the world.
---How long did it ________you to solve the problem? ---I _______about half an hour on it.
---Could you come back home at three o’clock? ---_________. I will have a meeting at half past two and it will last two hours.
--- We will build a subway(地铁) in Taizhou before 2015. --- Wow, ________________!
--- Are you happy with your grades in the math exam? ---Not at all. I can’t have ________________.