[ti:UNIT 2 My Favourite School Subject Lesson 12:Tick-tock] [0:01.005]UNIT 2 第二单元 [0:02.770]My Favourite School Subject 我最喜欢的科目 [0:05.788]Lesson 12: 第12课: [0:07.439]Tick-tock 嘀嗒声 [0:09.090]You need three groups to si...