----Whose is that book?----It _________ belong to Lucy. Her name is on it.
There __________ a sports meeting in our school next week.
—Bob, can you read the number 2, 307,018? —Yes, I can. It’s ________.
This is ____ my pen. I’m writing with ___ pen.
---What should I do, doctor? ---_______healthy, you should take more exercise.
There is _________ sheep _______ grass under the big tree.