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


完形填空

阅读下列短文,从每小题所给的A、B、C、D四个选项中选出一个最佳选项。

Mr Black was once a policeman. He was a kind person. He liked to have a walk in the park after breakfast.

  It was very cold 1 a winter morning. Mr Black was walking along the street when he heard a cry for help. He turned around but could see nobody. He stopped and looked here and there. At the moment, a boy 2 to him.The boy was in such a hurry 3 he couldn’t say a word except pointing towards the river. Mr Black realized what had happened and ran to the river as soon as possible.

4 of them ran along the river and saw a girl in the water. She 5 a piece of wood. It was carrying her away. It was too 6 .

  Without a word, Mr Black took off his clothes as 7 as he could, and jumped into the river. He 8 to the girl and took her back near the bank and lifted the girl up, and then the boy helped 9 her out of the water. Then they stopped a car and took the girl to the 10 . At last the girl’s life was saved, and she thanked them verymuch. X|k | B| 1 . c|O |m

( )1. A. in B. on C. at D.for

( )2. A. walked up B. looked out C. rushed out D. ran up

( )3. A. so B. and C . that D.but

( )4. A. All B. Both C. Neither D.either

( )5. A. was holding B. was lifting C. is taking D.is pushing

( )6. A. heavy B. exciting C. dangerous D.interesting

( )7. A. slowly B. carefully C. quickly D.quietly

( )8. A. swam B. ran C. flew D.walked

( )9. A. push B. pull C. bring D.take

( )10. A. house B. school C. park D. hospital

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