One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.

 One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.

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

One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.

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

. One third of the area ______ covered with trees. About seventy percent of the trees ______ been planted recently.

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

One-third of the area _____ covered with green trees. About seventy percent of the trees _____ been planted.

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