4. Prepositions.
(1) at the moment
(2) in +地点
(3) on the phone
(4) at +时间
(5) on +具体日期
(6) at +宗教节日
(7) on +电话号码
(8) in + 月份
(9) at + 时间
(10) on + 具体日期
小结：
介词用法简介Saying when things happened
在表示时间时，我们有三个介词可以选择：in，at和on。
介词in的用法：
介词in 用在年、月份、季节、一天中某个部分以及年代的前面。
比如，
in 1999 在1999年
in August 在八月份
in winter 在冬季
in the afternoon, in the evening, in the morning 在下午/在晚上/在早上
in the 1950s 在50年代
in the 21st century 在21世纪
介词on的用法：
介词on用在星期几、几号等具体的日期前。比如：
on Thursday 在星期四
on 19 January 在1月19日
on Monday morning (请比较：in the morning)
on a cold night (请比较：at night)
但是当星期几的前面有指示性的词比如：this，next和last来修饰时，就不用介词on。
介词at的用法：
介词at 用在点钟、宗教节日和一些固定的词组中。比如：
at 5.30 p.m. 在下午5.30分
at Easter 在复活节
at the end of the war 在战争的末期
at the beginning of the term 在这学期开始
但是当宗教节日中带有day这个词时，前面的介词用on 。
at Christmas on Christmas Day
at/on the weekend 在周末
VI. Memo Writing
参考答案：
To: Alice Hu, Secretary
From: David Guan, Manager
Date: 29 June 2001
Subject: Arrangement for my holiday
I’m going on my annual holiday next Monday 2nd July for three weeks. Please keep my mail until I return. If something urgent occurs, please report it directly to our Deputy Manager or contact me on 12345678903.
mail noun [uncountable]
1 the letters and packages that are delivered to you
2 especially American English the system of collecting and delivering letters and packages
British equivalent: post
3 messages that are sent and received on a computer
ￚsynonym email
VII. Oral Practice
Career goals
l What are your career ambitions?
参考答案：
l I would like to become a HR manager. Then I can help the company I work for to seek best candidate and make them fulfill their ambitions.
l I intend to be a receptionist to meet people and show the best side of our business.
l I aim to be self-employed.
l My career ambition is to set up my own company which can offer high quality products or services.
l Do you think people should take professional advice when planning their careers?
参考答案：
Yes. Sometimes people cannot really identify where their strength and weakness lie. Therefore, it’s better to get professional advice to map out career development plans.
l Do you think business people need to be flexible when planning their careers?
参考答案：
Yes. The business environment changes very rapidly. The chances are that your original career plan may not be reasonable at times and you cannot stick to your targets. Then in this case, people have to be flexible to make better achievements.
l Do you think it is necessary to have long-term goals in your careers?
参考答案：
Yes. I think long-term goals can ensure that you will always have a long way away from it. It will encourage you to be tenacious and resilient to realize the goals in the end.
tenacious adjective
determined to do something and unwilling to stop trying even when the situation becomes difficult 固执的，百折不挠的
a tenacious negotiator 一位百折不挠的谈判者
resilient adjective
able to become strong, happy, or successful again after a difficult situation or event
Children are often very resilient. 孩子们经常是在遇到困难后仍能保持开心乐观。