Question

Those books are yours, and the rest 　　　 mine.

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

Answer 1

B
the rest代表前文所提到的人或物。它的单复数形式有他所代表的名词所决定。Those books是复数，故the rest也是复数。做主语时谓语动词要用复数。故选B。