新概念英语第一册 Lesson 18 What are their jobs? 他们是做什么工作的？

每日一记：
Eat to live, but do not live to eat.
(吃饭是为了生活，但是生活不仅仅是为了吃饭)

重点：
1 (keyboard operators)/air hostesses
What are their jobs?
Are they keyboard operators or air hostesses?
They aren't keyboard operators. They'ar air hostesses.
(她们是做什么工作的？)
(她们是电脑操作员还是空姐?)
(她们不是电脑操作员，她们是空姐)

2 (postmen)/policemen
What are their jobs?
Are they postmen or policemen?
They aren't policemen. They are postmen.
(他们是做什么工作的?)
(他们是邮递员还是警察?)
(他们不是警察，他们是邮递员．)

3 (customs officer)/hairdressers
What are their jo