题目内容
One-third 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
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。
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