题目

根据短文内容，将方框里A—E五个句子分别填入文中空缺处，使内容完整、正确。D I will never forget the smile and the look of a young man's face on the train. One day I took the train home. The man looked dirty and you could easily notice his drug addiction (瘾) from his appearance. The train was extremely crowded but no one wanted to sit near him. I walked to him and sat directly opposite him. I would never forget the look on his face. He was shocked that someone would sit opposite him. He realized that I could easily see his drug addiction from his appearance已知?ABCD中，∠A比∠B小20°，那么∠C的度数是________度．