—The story is not easy for students to understand—I agree with you it’s not very long

问题补充：

—The story is not easy for students to understand.

—I agree with you, it’s not very long.

A. or

B. but

C. and

D. though

答案：

A. or

B. but

C. and

(答案→)D. though

解析：句意：——这个故事对学生来说不容易理解。——我跟你意见一致，尽管他不是很长。

A、或者 ；B、但是；C、和；D、尽管。故选D。