问题补充：
The number of students in our schoolabout 3,000 andthem are from the countryside.
A. is; a large deal of
B. are; a number of
C. are; large deal of
D. is; a large number of
答案：
A. is; a large deal of
B. are; a number of
C. are; large deal of
(答案→)D. is; a large number of
解析：考查主谓一致和词组，第一空填is，因为主语是the number of…的数量，谓语用单数，第二空them指的是the students，用a large number of修饰，a large deal of修饰的是不可数名词，句意是：我们学校的学生数量大概是3000人，并且很多人是来自乡村。选D。
