根据Lingling 的游览路线图，选词填空。 

 

Hello! I'm Lingling. I (go/went) to London Town with Amy. Amy's house is close to Buckingham Palace. We (worked/walked) to Buckingham Palace. We went to Big Ben by bike. We (came/visited) the London Eye and we (see/saw) the city from above the ground. Then we went to Hyde Park by (bus/bike). It's very beautiful. We met an old man with his two dogs in the park. They are very cute.