Half of the class       done most of the work. The rest       rather difficult.

Half of the class       done most of the work. The rest       rather difficult

1. A.
   has, is
2. B.
   have, are
3. C.
   have, is
4. D.
   has, are

Half of the class done most of the work.The rest rather difficult.

A.has ,is B.have ,are C.have ,is D.has ,are