In our school library there ____ a number of books on science and the number of them ____ growing larger and larger.

The light ____  red. You ____  cross the road.

The number of teachers in our college _____ greatly increased this term. A number of teachers in this school _____ from the countryside.

— 　　　 you or your sister fond of music? — Neither she nor I 　　　.

The brown trousers _______ 70 dollars. And that white pair of trousers _______ 80 dollars.