问题
According to the survey, two thirds of the area__________covered by trees now and 90% of the population__________contributions to the Greening Project in the city
A:is ; has made
B:are; have made
C:is; have made
D:are; has made
B:are; have made
C:is; have made
D:are; has made
正确答案是：
同类题型
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