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Period 1

1. Background about the topic of this module

2. Introduction

I Talking about the topic of this module

The topic of this module is “environmental conservation”(环境保护).This module mainly introduces sth about the sandstorms in Asia, especially in China. At the same time, it brings in some words about sandstorms and environmental conservation.

What is a sandstorm? A sandstorm, a kind of disastrous [di΄zα:strəs](灾难性的)weather system, is a combination of sand and strong wind.

What on earth causes sandstorms? In my opinion, severe sandstorms are usually caused by both natural and contrived[kən΄traivd](人为的)factors, that is, climatic, geographical, social and human factors. Of all the factors, the overuse of natural resources, such as cutting down too many trees and opening up too much untouched land, leads to the frequent occurrence of sandstorms.

Where does a sandstorm usually go? As mentioned above, disastrous as it is, a sandstorm does not go everywhere, coming to only those places with dry weather and little vegetation.(植物的总称).Take China for example, in the northwest of our country, where there is little forest, sandstorms are worsened with(因为---而恶化)people’s activities like digging up grass and mining(采矿).Bare land easily gives away its land when strong winds come, interaction of sand and wind forming a sandstorm..

And what damage will sandstorms usually cause? In a word, a lot of damage. Sandstorms can kill people and animals, put down buildings and cause poor harvests. What’s more, they can pollute the atmosphere and blow away top soil.

As a senior student, what should we do to prevent sandstorms? Here are some valuable suggestions: ①Control air and water pollution;②Build green fences along the desert;③Forecast sandstorm’s real time to prevent disaster;④All countries should join hands to propose a master plan in sandstorm s control and prevention.

Ⅱ Dealing with Introduction

Introduction is the warming up of this module. This part mainly introduces some words related to sandstorms. We’ll learn it by finishing the following 3 activities.

Activity 1 (at P31)

1. Ask the Ss to look at the picture and ask “What happens?” The Ss will give their possible answers like this: There is a terrible sandstorm. Some cars are almost buried. That is, they are almost covered with sand.

2. Then ask the Ss to complete the sentences using the correct form of each of these words in the box..

3. Explain some words:

1) frighten: (vt)“使害怕”、“使(人)感到恐惧”

eg: The storm frightens the baby.(暴风雨使那个婴儿受惊吓)

He looked frightened as he spoke.(他说话时显得非常恐惧)

Nuclear war is very frightening.(核战争是非常恐怖的)

2) last: (vi) “持续”、“持久”、“足够维持”, 后面常接一端的时间状语，且状语前可带或不带for.

eg: The war lasted (for) 5 years.(战争持续了5年)

How long do you think the fine weather will last?(你认为这样的好天气会持续多久呢?)

We have enough food to last a week.(我们的食物足够维持一个星期)

[extend](拓展)：

⑴last: (adj)“最后的”、“过去的”

eg: Saturday is the last day of a week.(星期六是一周的最后一天)

Great changes have taken place in China in the last ten years.(在过去10年里中国发生了很大变化)

(2)last: (n)“最后的人或事物”

eg: These are the last of our books.(我们就剩下这些书了)

Activity 2 (at P31)

1. Read out the words and ask the Ss to repeat them after you.

2. Then ask the Ss to work in pairs to decide which of the following states is false.

3. Explain the word “sign”.

1)作n:

①“标志牌”、“符号”、“动作”、“手势”

eg: Haven’t you seen the sign “No parking”?(你没有看到牌子上写着“不许停车”吗?)

Shaking heads is a sign of disagreement.(摇头是表示不同意的动作)

②“迹象”、“征兆”、“痕迹”

eg: Very often dark clouds are a sign of rain.(乌云常常是下雨的征兆)

Scientists have found no signs of life on Mars[mα:z](火星) so far.

2)作vt:

①“签名”、“签约”

eg: He signed his name on the book.(他在那本书上签上了他的名字)

Lu Dehua has signed with the television station to act in the new movie.(刘德华已经和那家电视台签约在新剧中出影)

②“示意”、“作手势”

eg: He signed me to be quiet.(他示意要我安静)