You______buy Tom a present if he invites you to his birthday party.
The price of the book is __________ so I would rather not buy it.
My hobby is collecting stamps.I need __________ before I have 3000 stamps.
The number of the classes in our school is __________ than__________ of any other school in Nanjing.
He was just leaving ________ the telephone rang.
—— Why are you lying in bed? —— A __________ walk __________ me completely tired.