They won’t let their teacher in that way. A. to be treatedB. being treatedC. treatedD. be

问题补充：

They won’t let their teacher in that way.

A. to be treated

B. being treated

C. treated

D. be treated

答案：

A. to be treated

B. being treated

C. treated

(答案→)D. be treated

解析：let sb do, 此处用的是被动语态。