—Tom, I don’t have a soccer ball. Let’s play ______ ping-pong. —OK. I have two ping-pong bats.
I don’t think it is _____ good idea to go to school without ______ breakfast.
_______ can I keep the books?--- Two weeks.
--Whose Iphone5 is this? --It’s not _______. I think It’s _________.
Nanjing is one of _______ in China.
We are sure one day the air in Beijing will be much ______ than today.