[ti:UNIT 6 Accidents! Lesson 42 Be Careful, Danny!] [0:01.213]UNIT 6 第六单元 [0:02.776]Accidents! 事故! [0:04.806]Lesson 42: 第四十二课: [0:06.486]Be Careful, Danny! 当心,丹尼! [0:09.228]THINK ABOUT IT! [0:10.629]List some ser...