题目内容
One-third of the area _____ covered with trees. About seventy percent of the trees _____ been planted recently.
A. is; have B. is; has
C. are; have D. are; has
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题目内容
One-third of the area _____ covered with trees. About seventy percent of the trees _____ been planted recently.
A. is; have B. is; has
C. are; have D. are; has