[00:00.00]
[00:01.39]Unit 2 They were young.
[00:05.53]一、Listen and number. 听一听，排一排。
[00:14.59]1.W:They weren't old then.They were young.
[00:20.30]1.W:They weren't old then.They were young.
[00:25.61]2.M:She wasn't tall then.She was short.
[00:30.37]2.M:She wasn't tall then.She was short.
[00:34.90]3.W:I wasn't ten then.I was two.
[00:41.35]3.W:I wasn't ten then.I was two.
[00:47.11]4.M:It wasn't clean then.It was dirty.
[00:52.94]4.M:It wasn't clean then.It was dirty.