第二部分.语言知识及应用（共两节，满分45分）
第一节完形填空(共15小题；每小题2分．满分30分)
阅读下面短文，从短文后各题所给四个选项（A、B、C、D）中选出最佳选项，并在答题卡上将该项涂黑。
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. There was an 16 seat facing a young man. The man looked 17 and you could easily notice his drug addiction from his 18 . The train was extremely 19 but no one wanted to sit near him.
I 20 to him and sat directly opposite to him. I looked him in the eye and smiled. I would never forget the 21 on his face. It was a special look of shock, shame and amazement. He was obviously 22 that someone would sit opposite him. Then a look of shame 23 the shock. He realized that his drug addiction was so 24 that I could easily see it from his appearance. Then he tried to clean up himself 25 and quietly. He straightened his posture and 26 his hair. After the clean-up, he said nothing nor tried to get closer. He
