问题补充:
The teacher suggested the dictionary at once.
A. be referred to be bought
B. be referred to being bought
C. referred to be bought
D. referred to being bought
答案:
A. be referred to be bought
B. be referred to being bought
(答案→)C. referred to be bought
D. referred to being bought
解析:这题考查过去分词做定语和虚拟语气的用法:referred to是过去分词做定语,修饰the dictionary,又因为suggest表示“建议”时,宾语从句用sb (should) do的虚拟语气,选C。