The teacher said that they hard-working students.A. isB. areC. wereD. was

问题补充：

The teacher said that they hard-working students.

A. is

B. are

C. were

D. was

答案：

A. is

B. are

(答案→)C. were

D. was

解析：考查宾语从句的时态。宾语从句的时态必须与主句保持一致。主句用的said，是过去式，故从句也用过去式，排除A、B；从句主语they是复数，故谓语也用复数，排除D。

句意“老师说他们是很刻苦的学生。”故选C。