Listen! Peter is singing in the classroom! —It _____ be him. He has gone back to his hometown.

Don’t lose heart. It won’t be long ___________ you catch up with others.

The post office is ______ the park. [ ]

Smoking is not allowed in our school, so it may be a good chance for our math teacher to_______ smoking.

Do you know the boyis sitting next tu Peter?–Yes, he is Peter’s friend.They are celebrating hisbirthday.