The speaker________have criticized the paraprofessionals,kno
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1. 答案:C. 2. 翻译:这个演讲者既然完全知道观众席上就有专业人员助手,他就本不该对他们提出批评. 3. 解释: 固定搭配:should not have done sth=ought not to have done sth 本不该做某事(但实际上已经做了) A 多了个to B 有must have done sth,但是没有must not have done sth; D 有may have done sth, 但是如果要表示否定,会用can't/couldn't have done sth,而没有may not have done sth.