--- All my classmates looked and could not stop .--- They must be sharing something funny with each other.
— Your mother plays tennis very often, doesn't she? — Well, she doesn't like it now. But she _____________.
— is the population of your city? —There are about four .
—What the number of the students in your class ? —About 60 . A number of them girls .
Why not ____ your teacher for help when you can't finish _____ the story by yourself?
—What him last night? —He had an accident on the way home.