15. Three quarters of the land here _____ wet land, an ideal place for migrating birds.

A. are     B. is C. have been   D. Being

Three quarters of the land here _____ wet land, an ideal place for migrating birds.

A. are 　 B. is C. have been D. being

15. Three quarters of the land here _____ wet land, an ideal place for migrating birds.

Three-quarters of the land here ________ wet land, an ideal place for migrating birds．

1. A.
   are
2. B.
   having been
3. C.
   is
4. D.
   being