Many a student made that mistake before which is another way of saying a great many stud

问题补充：

Many a student made that mistake before, which is another way of saying a great many students made that mistake.

A. had; has

B. has been; have

C. have; has

D. has; have

答案：

A. had; has

B. has been; have

C. have; has

(答案→)D. has; have

解析：考场主谓一致。Many a加单数名词，谓语动词用单数，且应该用现在完成时态和主动语态，排除A,B,C；a great many加复数名词，谓语动词用复数，所以选D。