---My bike is broken.
---Why not have it ________?
---Are the cards ________?
---Yes, they are ________.
---I want to be a doctor.
---Doctors ________ greatly in every part of the world, I think.
---What do you think of the two backpacks?
---________ of them are very nice.
---Tom, you look tired this morning.What's wrong?
---I was so busy that I didn't go to bed ________ 12 o'clock last night.
--- How long is he staying?
--- ________.