Do you know that you can use your watch as a compass (指南针)on a sunny day?Take a watch and point the hour-hand in the direction of the sun .Imagine (想象)a line which runs from the center of the watch through a point half-way between the hour-hand and number one. This line will surely point south.
    If you know astronomy a little, you will understand why this works. Inthe northern half of the earth, the sun is in the south at noon. In Russia, the real noon is one o'clock. If at that time we piont  the hour-hand at the sun, the hour-hand and the number one will point south. That is why you must imagine a line which will run from the center .If the watch through a point half -way between the hour-hand and number one. It will point south. If you are in the southern part of our planet, you must point number 12 at the sun. The line which you can imagine between number twelve and the hour-hand will then show north.
1 When we carry out this experiment in the northern part of the earth ,we should point ______at the sun.
A．number 12   B．the minute-hand   C．the hour-hand  D．number one
2 What does the underlined word "astronomy" mean in the passage?
A．天文学  B．地理学  C．宇航学  D．逻辑学
3 The passage tells us that we can use a watch ____on a sunny day.
A．to study the weather     B． to show direction   
C．to enjoy ourselves       D． to keep good time
4 If you are in Australia ,which of the following is the right way to show north?
 
5 What's the best title for this passage?
A． Your Watch Becomes a Compass  B． An Interesting Watch
C． The Story  of a Watch          D． The Sun and a Watch

    Hi．my name is Christina Baum．I’m a fourteen-year-old German student．I’m writing to tell you about an experiment we are doing at school with our science teacher．At the beginning of this school year，Frau Keller showed us films and we read articles about problems in the environment. One day she said．“I want to know what you think．Please don’t tell me what we should do or must do．(83)Tell me what each of you will do to protect the environment．”

    She asked us to choose a topic．make a weekly plan and tell the class about it．Then we had to do things to be“green”and write a report about our success．Some students said that they thought it was impossible for a single person to contribute to the protection of the environment．Someone else said that scientists should work harder to find new ways to produce energy．

   Frau Keller said that it is everyone’s job to care for the health of the planet．(84)After the first week everybody in class was excited about the project and wanted to continue to improve their results．Someone suggested telling the other classes in the school．Now all 768 students at Hermann Stein School are working on the project．At the end of the year，our class will write a report about what we have done．

    (85)下星期我将会考虑怎样不会浪费水或者污染水．I’m planning to try and use less water every day，and also not use so much of the things that make it dirty．Every time I turn on the tap(水龙头)I must think about how much water and soap I use．

A．根据短文内容简要回答问题。

1．What articles did the students read at the beginning of this school year?

2．Whose duty do you think it is to protect the environment．?

B．将短文中划线的英语句子译成汉语，汉语句子译成英语，

3．                                                                        ．

4．                                                                         ．

5．                                                                         ．