问题
选择题
Onethird 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
答案
C
“分数或百分数+of the+名词或代词”作主语时，谓语动词的单、复数形式取决于名词或代词的单、复数形式。