---Mum, could I play games now? ---Unless all your homework ______________
The teachers ________ on the blackboard with chalk in the future.
- ________ book is this?-- It's Mary's.
There ________ some tomatoes and milk in the box, but now there aren't any.
Our school is ________ a park and a big library.
Is this ________ bike? No. ________ is over there.