第一步 作业检查
1. Remind students of what they learnt in the reading passage.
2. Check their homework: “Discovering useful words and expressions”.
第二步 查找
Ask students to look for useful words and expressions in Warming up, Pre-reading and Reading.
第三步 问答（双人活动）
1. Students ask and answer each other in pairs the relative usages and meaning of words and expressions they have found.
2. Students may refer to some helpful materials to solve some difficult points.
第四步 讨论（四人小组活动）
1. Group of four students discuss some difficult but important words and expressions.
2. One student may take notes of the difficult points they can't solve and hand to the teacher.
第五步 释疑
Teacher may pick out some general difficult points from the students and have a thorough explanation.
Teacher may offer some other important language points students haven't noticed yet and give necessary analysis, for example:
1. First aid is the first kind of help given to someone who suddenly falls ill or gets injured before a doctor can be found.
急救是一个人突然病倒或受伤时，在找到医生之前给病人或受伤者首先进行救助。
first aid 的意思是“急救”，例如：first aid to the injured 给予伤员的急救。
短语联想
give/offer aid 援助 come to sb's aid 帮助某人
cut off aid （突然）终止援助 a hearing aid 助听器
teaching aids 教具 medical aid 医疗救护
with the aid of 借助于
get injured 受伤，在现代英语中大量地出现了由“get + 及物动词不达意的过去分词”构成的被动语态，这叫 get - 型被动语态。又如：
The computer got (was)damaged when we were moving. 我们搬家的时候，电脑碰坏了。
My bike is getting (is being)repaired row. 我的自行车正在修理。
My glasses got broken while I was playing basket-ball. 我的眼镜在打篮球时给弄坏了。
Peter and Mary got married last year. 彼得和玛丽于去年结了婚。
2. You have three layers of skin that protect you against diseases, poisons and the sun's harmful rays.
你有三层皮肤来保护你免遭疾病、毒药和有害光线的侵害。
Protect 动词，“保护、维护”，用于句式“protect + 名词 + against/from + 名词”。例如：
He is wearing sunglasses to protect his eyes from the strong sunlight. 他带着太阳镜以挡强烈的阳光。
He raised his arm to protect his face from the blow.
他举起胳膊护住脸以免脸部被击中。
短语联想
Keep... from... 不让/避免 stop... (from) ... 阻止
prevent...(from) ... 妨碍/防止 disable... from... 使……失去（能力/资格）
save... from... 挽救、拯救
3. Burs are called first degree, second degree or third degree burns depending on which layers of the skin are burnt.
根据皮肤的哪层组织被烧伤，被划分为一级（烧伤）、二级（烧伤）或三级（烧伤）。
depend on 取决于。例如：
The amount you pay depends on where you live. 你付多少取决于你住哪里。
词义拓展
depend on 依靠，依赖：His family depends on him. 他的一家人全靠他养活。
依赖，信任：We are depending on you to finish the job by Friday. 我们相信你在星期五前能完成这项工作。
4. For second degree burns, keep cloths cool by putting them back in the cold water, squeezing them out and placing them on the burned area over and over again for about an hour until bain is not so bad.
对于二级烧伤，要保持绷带布清凉。措施有：把他们再放到冷水上（浸泡）、拧干后盖在烧伤处，如此反复一小时左右，直到疼痛基本消失。
squeeze 动词，意思是“榨取”、“挤出”，例如：squeeze an orange 榨橘子
常用句式
squeeze + 名词 + out(of/from) + 名词，例如：
Those blackmailers intended to squeeze more money out of him.
那些勒索者打算向他榨取更多的钱。
over and over again 再三地。例如：
I’ve told you over and over again not to do that.
我再三告诫你不要那样做。
5. hurt 既可作及物动词，作“伤害”、“使受伤”解，也可作不及物动词，作“疼痛”、“感到疼痛”解。既可表达身体的受伤，也可以表达情感的伤害。例如：
The little boy has fallen off a ladder and hurt himself. 小男孩从梯子上摔了下来 受了伤。
The driver hurt himself in the accident. 司机在事故中受了伤。
It hurts the eyes to read in such poor light. 在这么弱的灯光下看书会伤害眼睛的。
My feeling were hurt when they talked about me like that. 他们那样谈论我使我的感情受到伤害。
She was hurt to think of being left alone. 他一
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