A number of students playing on the ground but I dont know what the exact number.A. are;

问题补充：

A number of students playing on the ground but I don know what the exact number.

A. are; is

B. are; are

C. is; is

D. is; are

答案：

(答案→)A. are; is

B. are; are

C. is; is

D. is; are

解析：a number of一些，许多；the number of……的数目。句意：许多学生正在操场上玩，但是我不知道确切的数目是多少。结合语境可知前文主语为复数形式，故系动词用复数。下文主语number表示抽象含义，故谓语动词用单数，选A。

如果觉得《A number of students playing on the ground but I dont know what the exact number.A. are;》对你有帮助，请点赞、收藏，并留下你的观点哦！