分类：教育/科学-外语学习
问题：英语
-I rang you yesterday afternoon.A man answer,but I don't recognize the woice-It () my uncleA must have beenB  should have beenC must beD should be 
回答：根据句意，那肯定是我叔叔
表示强烈肯定的只有C选项
所以选C