Although they plant trees in this area every year, the tops of hills are still ______.

Although they plant trees in this area every year, the tops of hills are still ______.

1. A.
   blank
2. B.
   hollow
3. C.
   vacant
4. D.
   bare

Although they plant trees in this area every year, the tops of hills are still ______.

A .blank         B. hollow           C. vacant           D. bare

Although they plant trees in this area every year, the tops of hills are still ______.