The number of students in our school 9 000 and a number of them from the city.A. are; ar

问题补充：

The number of students in our school 9,000 and a number of them from the city.

A. are; are

B. is; are

C. is; is

D. are; is

答案：

A. are; are

(答案→)B. is; are

C. is; is

D. are; is

解析：A number of 相当于many,后面用are.。the number of 是……的数目，后面用is。