A teacher was giving a talk to his students on stress (压力) management. He raised a glass of water and asked them,"How 31 do you think this glass of water is?"

   The students began to think and 32 Their answers are different,from 20 g to 500g.

"It does not matter on the real 33 It depends on how long you hold it. If I hold it for a 34 ,it is OK. If I hold it for an hour,I will have an ache in my right arm. If I hold it for a day,you will have to call a 35 It is the exact same weight,but the longer I hold it,the heavier it becomes. What we have to do is to put the glass down,36 for a while before holding it up again. "

   "If we carry our burdens (负担) 37 , sooner or later,we will not be able to carry on. The burden will become increasingly heavier. We have to 38 the burden every now and then,so that we can be refreshed and are able to carry on."

     So 39 you return home from work tonight,put the burden of work down. Don’t carry it back home. You can pick it up tomorrow.

    Whatever burdens you have,let them down for a moment if you can. And learn to 40 yourselves.

Life is short but amazing. Enjoy it!

31. A. heavy   B. full   C. much   D. long

32. A. read   B. watch   C. guess   D. listen

33. A. glass   B. weight   C. water   D. height

34. A. minute   B. night   C. day   D. week

35. A. mother   B. teacher   C. doctor   D. friend

36. A. rest   B. shake   C. look   D. work

37. A. this time   B. some other time

   C. next time   D. all the time

38. A. give up   B. put down

   C. pick up   D. think about

39. A. after   B. since   C. before   D. until

40. A. save   B. help   C. care   D. relax

        Why does the sky change colors?

   What is the sky? How high is it? What color is it? What birds can live above it? These questions are difficult to answer,aren’t they?

    In fact,the sky has no color. Then why does the sky look blue?

    We know that there is air around the world. When planes fly,they need air to lift their wings. Planes can9t fly very high. That is because the air gets thinner when they go higher. The same will happen to us if we go high enough. If we go up about 1,200 kilometers from the earth,we’ll find no air there. Some birds can fly into the sky as high as a plane,but they cannot fly or live without air.

    Looking up above us,you will see the blue sky with white clouds. It is usually light blue. The color will be bluer when you see on the top of a high mountain. And you will see fewer clouds in the sky between you and the sun.

   Sometimes the sky doesnH look blue. When the sun rises or falls,you will see red,orange,and other colors in the sky. Such are the most beautiful moments of the day.

    Who can see the colors of the sky high above the earth? The astronauts!They can see those beautiful colors of the sky from the outer space. However,before flying into the outer space,they sit in a spaceship high above the earth,and there is no air at all. The sky will be that dark and its color will be black.

   Now you may understand that we see colors because the air scatters (使散射) the sunlight. Light travels through the air. Without air,there would be no light or colors.

52. Planes can't fly as high as possible because .

   A. the sky is blue

   B. the wings are heavier

   C. the sky has no color

   D. the air becomes thinner

53. When you stand on the top of a high mountain,you will see

   A. more air       B. bluer skies

   C. more colors   D. more clouds

54. In Huzhou,we might see many colors in the sky at during the day.

   A. 6:00 a. m.      B. 9:00 a.m.

   C. 1 :00 p. m.     D. 3:00 p. m.

55. The sky changes colors because.

   A. it's colorful itself

   B. the world is colorful

   C. the sunlight has colors

   D. the air scatters the sunlight

John ’ s Favorite Job

John was ten years old, and he was a very lazy boy. He didn’ t like doing any work. He had to go to school of course, but he didnt study hard there and tried to do as little work as possible. His father and mother were both doctors and they hoped that their son would become one, too, when he grows up. But one day John said to his mother, “I want to be a dustman (清洁工)when I finish school.

“A dustman?” his mother asked, and she was very surprised.

“That’s not a very pleasant job, why do you want to become a dustman?”

“Because then I only have to work one day a week. ”John answered.

“Only one day a week?” his mother said. “What do you mean? And how do you know?”

“ Well,”John answered,“ I know that the dustmen. They come to our house to work on Thursdaybecause I only see them on that day. There is some rubbish in our house. They collect (收集)it and take it away.

(    )1. John_____

A. was a 12-year-old boy   B. was a lazy school boy

C. studied hard at school   D. wanted to work in a hospital

(    )2. What are John's parents?

A. Doctors.    B.Teachers.    C.Scientists.   

 D.  Farmers.

(    )3. John 's mother felt_when she knew he want to become a dustman.

A. sad          B. upset    

C. surprised    D. excited

(    )4. John thought_____

A. he did well in his study  B. his parents worked less harder than him

C. the dustmen made lots of money  

D. the dustmen only worked one day a week

(    )5. The underlined word “rubbish” means___in Chinese.

A.食品    B•信息    C.垃圾    D.玩具

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