问题
单项选择题
The speaker ______ have criticized the paraprofessionals, knowing full well that they were seated in the audience.
A．should not to
B．must not
C．ought not to
D．may not
答案
参考答案：C
解析：[分析] 近义辨析。 此处需注意情态动词的用法：ought (not)/to与should (not)后接完成时态意思相同，表示为本应做某事儿而未做(或本不应做而做了)感到遗憾，因此应选C。