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.

　　2. Discussion:

　　As senior students, what should you do to prevent sandstorms?

　　Here are some valuable suggestions:

　　1)Control air and water pollution;

　　2)Build green fences along the desert;

　　3)Forecast sandstorm's real time to prevent the disaster;

　　4)All countries should join hands to propose a plan in sandstorm control and prevention.

　　What can you add to these suggestions?

　　Students can discuss and add more to the above suggestions.

　　→ Step 2 Activity 1

　　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(Page 31)

　　Option One

　　1. Ask students to look at the picture and ask "What happens? "

　　Students 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.

　　The teacher can lead in and repeat the words in the box.

　　blow　bury　frightening　last(v. )　sandstorm

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

　　There has been a_____________. It_____________ for ten hours and was very _____________ . The wind_____________ the sand high around the houses, and some cars were almost completely _____________ by the sand.

　　Students can check the answers with their partners.

　　Suggested answers:

　　1)sandstorm　2)has lasted/been blowing　3)frightening　4)was blowing　5)buried

　　3. Explain some words:

　　1. It lasted for ten hours and was very frightening.

　　它(沙尘暴)持续了十个小时, 而且是非常可怕的。

　　frightening adj. causing fear; alarming 吓人的; 可怕的

　　a frightening experience一次可怕的经历