A number of the old men doing exercises now.

A.is　 B.will be　 C.are　　 D.were

The number of books in the bookshop is about 10,000 and a number of them        about science.

1. A.
   is
2. B.
   was
3. C.
   are
4. D.
   Were

The number of the films ______ than before.

1. A.
   is larger
2. B.
   is more
3. C.
   are larger
4. D.
   are more