Jack is a doctor. He is my good friend. He was back from London yesterday, and he called me to have supper with him at 7:00 pm in my house. But he didn't know my new address, so I told him and left the key under the door mat (垫子). I worked for a long time yesterday until late in the evening. When I was working, Jack called me again. He said, "I'm in your home. I had some cakes and meat. I'm watching TV now. But I didn't find the key." "How did you get into the room?" I asked. "I climbed up a pear tree beside your open window, then came in." "There isn't a tree beside my window. In fact, there is a tree near my neighbour's!" I said.