练习材料：
Lesson 32：Shopping made easy
任务配置：
L0+L1
知识笔记：
清辅音【s】
发此音时，双唇微张，上下齿轻轻闭合，不振动声带。
see ask class
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单词积累（from 口语粉碎机）
bail on 放弃，失约
Why don't you bail on your girlfriend tonight and come out with the boys instead?
你为什么不能放弃今晚和女友的约会,来和哥几个玩去呢?
We had to bail on our golf game, It's pouring rain outside.
雨下的这么大,看来我们得取消打高尔夫的念头了。
hit the sack 上床睡觉
Kids, time to hit the sack
孩子们，该上床睡觉了
call it a day 手工，到此结束
call it a night （活动）今晚到此结束
We‘ve been working forever on the project all evening. Let's call it a night.
我们今晚做这个方案好长时间了，今天就到这儿吧。
put it down to experience 吃一堑长一智
We lost lot of money, but we just put it down to experience.
as it happens 碰巧
As it happens，I have a spare key.
我碰巧有备用钥匙。
