Although they plant trees in this area every year,the top of some hills are still___.

题目

Although they plant trees in this area every year,the top of some hills are still___.
Although they plant trees in this area every year,the top of some hills are still___.
A.blank
B.hollow
C.vacant
D.bare
请陈述理由

答案

d
a表示空格
b表示空洞
c表示职位的空缺
d表示光秃秃的