精选优质文档-倾情为你奉上高中英语主谓一致专项练习题及答案从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。 1. 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; has3. What _ the population of China? One-third of the population _ workers here. A. is; are B. are; are C. is; is D. are; is4. Not only he but also we _ right. He as well as we _ right. A. are; are B. are; is C. is; is D. is; are5.