The number of chairs in the room_____ten.I’m afraid a number of chairs in the room____lost.

John is one of the staff members who ___to be sent abroad for further study.

-- Look at the trainers, Andy. They look like yours.--No. Mine             black and white.

Either you or one of your students _______ to attend the meeting that is due tomorrow. 

A lot of people as well as the president of the animal protection association ____________ experiments on animals.