问题补充:
----What the number of the students in your school?
---- About two thousand. A number of them from America.
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:句意:你们学校的学生数是多少?大约两千。其中许多来自美国。The number of …的数目,作主语时,谓语动词用第三人称单数形式。A number of 许多,作定语修饰名词或代词。