What _______ the number of the students in your school—About two thousand. A number of them _______ from the countryside.

Though the key was pressed, nothing ______ on thescreen.

I can’t see any reason to use cash anymore it’sso much easier to use other means of payment

There is ________advertisement about the clothes store. You can have a look.

Look at the glasses on the desk. Are they David’s—They belong to him. I saw him go out with glasses just now.