问题补充：
I suggested that the problem as soon as possible.
A. referred to being solved
B. referred be solved
C. referred to be solved
D. referred should be solved
答案：
A. referred to being solved
B. referred be solved
(答案→)C. referred to be solved
D. referred should be solved
解析：
试题分析:考查虚拟语气和非谓语动词。从that可以判断后面是宾语从句， suggest表示“建议”时，后面宾语从句的谓语应该用should +动词原形，should可以省去。而refer to 和problem之间是被动关系，故用referred to ，故C选项正确。句意：我建议那个被提到的问题应该尽快得到解决。
