问题
选择题
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
答案
答案：C
这题考察主谓 一致,当主语是分数和百分数时,谓语和它们修饰的名词一致,因为第一空的主语是 two thirds of the area所以第一空填is, ,第二空主语是90% of the population,强调具体的人,填have made.选C.