问题补充：
There a large number of students in our school. The number of the students over three thousand.
A. is; is
B. are; are
C. is; are
D. are; is
答案：
A. is; is
B. are; are
C. is; are
(答案→)D. are; is
解析：句意：在我们学校有许多学生。学生的数量是大约三千人。分析a large number of是指许多，近义于a lot of; 而the number of表示数量，指整体。故选D
