–What the number of the students in your school?–About two thousand. A number of them fro

问题补充：

–What the number of the students in your school?

–About two thousand. A number of them from England.

A. is; are

B. is; is

C. are; is

D. are; are

答案：

(答案→)A. is; are

B. is; is

C. are; is

D. are; are

解析：the number of ……的数目；A number of一些，许多。句意：你们学校学生的数目是什么？——大约两千。他们中许多人来自英国。结合语境可知上文表示学生的数目，number是抽象名词，不可数，故谓语动词用单数。下文A number of them表示复数含义，故谓语动词用复数形式，选A。