As more and more trees ____, tigers can ____ hide and hunt.

A. are cut down, not longer                 B. cut down, no longer

C. cut up, no more                             D. are cut down, no longer

As more and more trees ________, tigers can ________ hide and hunt．

1. A.
   are cut down; not longer
2. B.
   cut down; no longer
3. C.
   cut up; no more
4. D.
   are cut down; no longer