-_______ is this English book? -I think it is our_______.
-Mr Green has_____one-year-old son,doesn’t he?-Yes,and he also has______eight-year-old daughter.
It will______us several years to learn a foreign language well.
-_____the population of China?-_______over 1,300,000,000.
We have a lot of work______today.
In the piano contest,my brother didn’t play well and I did_____.