The headmaster suggested the problems referred discussed immediately.A. should beB. to be

问题补充：

The headmaster suggested the problems referred discussed immediately.

A. should be

B. to be

C. be

D. to being

答案：

A. should be

(答案→)B. to be

C. be

D. to being

解析：考查虚拟语气和固定短语。refer to“指，提到”；suggest“建议”，宾语从句应该用虚拟语气，即should+动词原形，should可省略。故选B。