I．Brief Statements Based on the Unit
This unit mainly talks about deadly diseases and attitudes towards AIDS，cancers，
etc．A11 the activities，including Warming up，Listening，speaking，reading and writing，center on this topic．Through this topic，the students not only get more information about diseases，but also learn how to keep a right and positive attitude towards diseases and people with diseases．
In addition，the students can 1earn some useful language points through the materials provided in each part，especially a lot of words and phrases，which are very helpful for the students to build up vocabulary about diseases．The Grammar--the Subjunctive Mood is also important．The given materials and exercises give the students an opportunity to learn grammar by using it．It helps the students learn to talk about things t}lat are not certain to happen as well as imaginary or unreal events and situations．
All of the activities are helpful for the students to improve their knowledge about 1anguage and their skills to use language．
Ⅱ．Teaching Goals
1.Talk about deadly diseases and attitudes towards AIDS，cancers，etc．
2.Practise talking about imaginary situations．
3.Practise supporting and challenging an opinion．
4.Learn to use the Subjunctive M00d(1)：lf 1 were you，…I Wish I could…
5.Write a personal narrative．
Ⅲ．Teaching Time：Four periods
Ⅳ．Background Information
1．Health Officials Struggle to Understand SARS Sever acute respiratory syndrome (SARS) has terrified the world．The question on everybody’s mind is whether SARS will become a global epidemic．
Researchers worldwide have galvanized to combat SARS．The challenge for public
health is to determine the nature and potential of any viral threat and to frame a battle plan．
“We are in an evolutionary stage of this epidemic，”said Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases in Bethesda，Maryland. “It could plateau，go up and down，disappear of explode．This virus is highly virulent，potentially lethal and highly transmissible--it has the potential to cause a really bad epidemic．”
A Deadly Combination
SARS is a so-called hybrid virus-the kind that always triggers a red alert．Traditionally a virus affects a single species．But sometimes two viruses combine their genetic material and form a new virus that“ jumps” to another species altogether．
Hybrids are dangerous because the body has never encountered them before，and the immune system is unprepared．
“From studying the sequence we see that the SARS virus is derived from a mouse coronavirus and an avian coronavirus，”said Michael Lai，a pioneer in coronavirus genetics at the University of Southern California in Los Angeles．
If the virus exists in a wild widespread host--like the West Nile virus carried by mosquitoes-then SARS could be a perennia11y recurring problem, according to Lai．
If the host is a domestic animal一like the chicken responsible for the Avian F1u virus of 1997--then the source of the virus could be eliminated．The Avian Flu effectively stopped after the Hong Kong government ordered the slaughter of chickens in the area．
Lai suspects that the SARS virus lurks in a wild animals. “It probably doesn’t bother domestic animals or we would have come across it before，”he said．
1f people are the only carriers of SARS，“honest reporting of SARS cases and stringent quarantines could stop the virus in its tracks ,”Lai said．
Knowing a Virus，Predicting an Epidemic
“Making a vaccine could be quite straightforward，if it is needed。”Lai said．
Vaccines already exist for swine and chicken coronaviruses. But it isn’t easy to gauge whether SARS，or any virus．can trigger an epidemic．
“We’ve been working with influenza for over 50 years and it can sti1l evade our best attempts．”
“In many cases of the influenza virus we don’t understand the molecular properties that cause high mortality，”said Nancy Cox， chief of the influenza branch at the CDC．
“Outbreaks are like wildfires，”Morse said．“Some fires smolder and are easily extinguished．Others rage out of control，destroying everything in their path．The WHO and the CDC are like the fire department and they need to investigate all outbreaks because you never know which way they could go．”
Morse points out our long history with influenza．SARS is only a few months old．
Tracking and containing viruses，and predicting what they will do，Morse said，“It is as much an evolving science as an evolving art．”
2．Fight Continues Against HIV／AIDS
A picture，a calendar or even a balloon may be the best way for millions of people living in China’s vast country areas to learn about AIDS，one of the biggest threats to public health in the world today．
China has decided to use user-friendly methods including exhibitions, VCDs and TV programmes to spread knowledge of the disease across the nation to try to keep it in check．
Educating people nationwide about AIDS is the top priority(優(yōu)先權)to prevent
the disease from getting out of hand．The farmers wil1 be given knowledge in the easiest way that they can understand．
A recent survey from the commission(調查團)of more than 7 OOO people in China
showed that nearly 20 percent of them had never heard of AIDS before．Just over 71 percent said they knew AIDS was highly infectious(傳染的),but most of them had no clear idea of how the disease could be spread．Just over 62 percent said they knew they could do things in advance to prevent them catching AIDS but they didn’t know what these measures were．
The month-long survey，carried out last December，talked to people in seven counties and cities across China including both developed coastal areas and the less-developed in-land areas．The interviewees changed from 15 to 49 years old，and country residents were about 63％ of the total surveyed．
Chinese residents，especially those in the country，have very little knowledge about what AIDS is all about，not to mention prevention and treatment．By the end of last year, there were 22 517 known HIV／AIDS cases in China．However，more than 6000000 people in China have been infected．
Since 1985，China has discovered 880 patients with AIDS一466 of them have died．
Sharing needles，prostitution(賣淫)and contaminated blood transfusions are major ways for HIV to spread．A lack of education has been the biggest difficulty against nationwide efforts to prevent AIDS，especially in the countryside．
The First Period
Teaching Aims：
1．Learn and master the following：
(1)Words：virus，via，mosquito，prevention, persuade
(2)Everyday English：
a．Supporting an opinion
I think that…，because…
First．…
One reason is that…
For example，…
If we／they were to…．we／they could…
b．Challenging an opinion
Perhaps．but what if／about…?
Have you thought about…?
What makes you think that…?
could you please explain…?
If 1 were you, 1 would…
2．Train the students’ skill to use language．
Teaching Important P0ints：
1．Master the use of the following words and phrases：via，persuade，try to persuade
2．Train the students’ listening and speaking abilities．
Teaching Difficult P0ints：
1．How to help the students understand the listening material exactly．
2．How to help the students finish the task of speaking．
Teaching Methods：
1．A quiz to check the students’ knowledge about AIDS．
2．Listening-and-answering activity to check the students’ understanding of the listening material.
3．Oral practice to train the students’ speaking ability．
4．Individual，pair or group work to make every student work in class．
Teaching Aids：
1．a(chǎn) tape recorder
2．a(chǎn) projector
3．the blackboard
Teaching Procedures：
Step I Greetings and Lead-in
T：Good morning／afternoon, everyone.
Ss：Good morning／afternoon, teacher,
T：Sit down，please．We often see programmes on TV and read stories in newspapers and magazines about persons who fight against diseases．What do you think of them?
Ss：They are unlucky but great．
T：Who do you think so? Li Ying，give us your opinion．
S：They are unlucky because the life is hard for them with diseases．a(chǎn)nd they may die earlier if they get some serious or even deadly disease．They are great because they have courage to fight against the diseases and sti11 try to make their life meaningfu1．
T：Very good speech．Sit down，please. How many kinds of deadly diseases do you know?
Ss：AIDS，cancers…
T：Yes．AIDS and cancers are two kinds of serious diseases．Today，we are going to 1earn Unit 7 Living with disease．
(Bb：Unit 7 Living with disease)This unit will help us know more about diseases and people living with disease．First，let’s learn some new words in the first period．Look at the screen．
(Teacher shows the screen and then deals with the new words．)
△deadly／′dedlI ／ adj．
△infect／In′fekt／vt．
△transmit/traenz′mIt/ vt．
△route／ru:t／n.
△donation／d u′neI n／n.
prevention／prI′ven n／n.
△cocaine／k u′keIn／n.
△imaginary／I′maed3In遰I／adj.
virus／′vaI r s／n.
via／′vaI ／prep．
mosquito／m s′ki：t u／n．
△stacy／′steIsI /
persuade／p ′sweId／ vt.
△heroin／her uIn／n.
(Bb：via，persuade／try to persuade)
Step II Warming up
T：As we a11 know，AIDS is a kind of deadly disease．The government has paid special attention to its prevention and treatment．And some ways to spread the knowledge about AIDS have been used across the country．How much do you know about AIDS? Now，open your books on Page 49. Here is an AIDS Quiz for you to check your knowledge about AIDS．First finish it individually。Then I’ll provide the right answers for you．You can begin now．
(A few minutes later，teacher shows the following on the screen and checks
the answers with the whole class．)
AIDS QUIZ
Decide which of these statements are true and which are false．Tick the
correct box．
True False
1.Only bad people get AIDS. □ □√
2.I can become infected with HIV by swimming in a pool，sitting in a bath， holding hands or kissing someone with HIV □ □√
3.In 2002，there were 42 million people living with AIDS in the world．□ □√
4.People who have not infected drugs do not need to get tested for HIV．
□ □√
5.1f I had HIV，I would know because I would feel sick． □ □√
6.HIV / AIDS is incurable． □√ □
7.People who have H1V look different from everyone else. □ □√
8.It is safe to be friends with people who are living with A1DS．□ □√
T：Wel1，now look at the pictures below the AIDS QUIZ．What information do they tell us about AIDS? Liu Yang, you try，please．
S：The pictures tell US that the AIDS can- not be transmitted via the following
routes；cups，glasses，toilet seat，swimming poo1s, mosquitoes or blood donation．
T：How do you know about that?
S：That has been shown by medical studies．
T：Well done．Thank you．Sit down, please．
Step Ⅲ Listening
T：Next，1et’s come to the listening part．The listening material will tell us
about a disease detective at the Centre for Disease control and Prevention．Now，please turn to Page 50．Let’s 1ook at the instruction and the questions in Part 1 first．Then I'll play the tape．At the end，I’ll ask some of you to answer the questions and we’ll check them together．Are you clear about that?
Ss：Yes．
(Teacher goes through the instruction and questions first．Then play the tape．Finally check the answers．After that, teacher asks the students to do
Part 2．)
T：Well，now please listen to the tape once again and take some notes of what you hear．Then use your notes to tell your partner about how stacy works，how she feels about her job，and what advice she gives. Are you clear about that ?
Ss：Yes。
T：And if you were a disease detective. What would you do to learn more about a new disease ? Talk about it with your partner at the end．Do you remember?
Ss：Yes．
T：OK．Now, please listen carefully．Remember to take notes．
(The students listen and make notes first. Then talk about the questions with their partners．At the end，teacher may asks some students to report for the rest of the class．)
(Bb：a disease detective．the Centre for Disease control and Prevention．)
Step Ⅳ Speaking
T：At the beginning of the class，we talked about some deadly diseases, and we also had a quiz on AIDS．We know AIDS is not only one of the deadly diseases but also a most serious social problem today．Could you please explain why? Guo Li，you try, please．
S：One reason is that it is incurable，another is that people know little about health care, prevention and education．
T：Well done．Besides AIDS there are some other most serious social problems such as drugs，smoking and drinking．Which do you think is the most serious one? Now let’s come to the speaking part．Choose one of the problems listed below or think of an- other serious problem．Prepare a role card on which you write down reasons why you think your problem is the most serious．Use the role card in the group discussion and try to persuade the other group members that your problem is the most serious one．Are you clear?
Ss：Yes．
T：And I'll show you some useful expressions on the screen to help you with your discussion．
(Teacher shows the screen．)
Supporting an opinion
I think that…，because…
First…
One reason is that…
For example，…
If we／they were to…, we／they could…
Challenging an opinion
Perhaps，but what if／about…?
Have you thought about…?
What makes you think that…?
Could you please explain…?
If I were you, I would…
(Teacher and the students go through the expressions together. Then the students begin to discuss in groups．At last．Teacher may ask some students to report for the rest of the class．)
Step V Summary and Homework
T：You all did very well in this class．Now let’s look at what we’ve done in this period．First，we’ve had a quiz to check your knowledge about AIDS，which helps us know more about AIDS．Second，we’ve listened to the tape about a disease detective at the Center for Disease Control and Prevention，which helps us get some knowledge about disease detectives and their work. Third，we’ve discussed what is the most serious problem today．This not only makes us care more about social problems，but also train our speaking ability．What’s more，we’ve learnt some useful words and phrases．After class, please practise more and prepare for the next period．So much for today. Class is over．See you tomorrow．
Ss：See you tomorrow．
Step Ⅵ The Design of the Writing on the Blackboard
Unit 7 Living with disease The First Period
1. via
e. g. We can send him a note via the internal mail system．
2．persuade sb．to do sth．；try to persuade sb．to do sth．
e．g. The salesman persuaded us to buy his product．
He tried to persuade him to change his mind．
Step Ⅶ Record after Teaching