Lesson 20 One man in a boat 付尹A. 用-ing形式连接以下各组句子，必要时可作其他改动。1. I went into the room. I didnt knock.(without) 2. Why dont you go by bus? Dont go by train.(instead of) 3. I left the restaurant. I paid my bill. (after) 4. I left the hotel. I met an old friend of mine.(on)
