A recent survey of 2000 parents in Britain showed that they are often afraid of science questions asked by their curious children only because they have no idea what the answer is. Here is a list of some simple questions that you can ask your parents to see if they know the answers.

    Q: Why is the sky blue?

    A: You probably know white sunlight is made up of seven colors. While it moves in a straight line when going through space, it starts to divide as it hits “raised area” in the atmosphere. The ones with longest wavelengths pass through easily. The blue , however , can be taken in by the gas molecules (分子) because it has a shorter wavelength , which in turn scatters (使分散) it in different directions. That’s why when you look up at the sky, it appears to be blue.

    Q:Why does the moon sometimes appear during the daytime?

    A: The simple answer to that is because just like any other object it is being lit by the sun. As long as it is around 45 degrees or even 90 degrees off the sun, it will receive light and be able to be seen. The only time it is not able to be seen during its 28-day orbit (轨道) around the earth is when it is right between the earth and the sun. That’s because its back , which is not lit by the sun, is facing us.

    Q: Where do birds/ honeybees go in winter?

    A: While the bird part is quite easy, since a lot of them get together and travel, the honeybee part is likely to puzzle your parents. It turns out that these busy insects stop being that active when the temperature drops below 50°F. Instead ,they get together in the lower central area of the hive （蜂巢）and form a ball around their queen. This helps keep both warm enough to survive the cold winter months.

1.The sky looks blue mainly because the color blue in the sunlight_______.

A. has the longest wavelength among all the colors

B. cannot be taken in by the gas molecules

C. doesn’t hit “raised area” in the atmosphere

D. cannot pass through space successfully

2.How long can’t the moon be seen during the daytime in a month?

A. 2                             B. 28                           C.30                                      D. 31

3.What do honeybees choose to do when the temperature drops below 50°F?

A. They choose to be active in the wild.

B. They choose to keep themselves warm.

C. They choose to travel to a warm place.

D. They choose to get together in the upper central area of the hive.

4.What is NOT explained in the passage?

A. Why is the sky blue?

B. Why is the moon able to be seen during the daytime?

C. Why do birds travel in winter?

D. Where do honeybees go in winter?

 

There was once a young man who began to feel self-satisfied after some small achievements.

    One day, the young man took a walk with a _16_ man from the town. On the way the young man was bragging (吹嘘) about himself, _17_ the wise man didn't say a word. When they _18_ a peak (山峰), the wise man asked, "Look down. What do you see?"

     "I see trees, farmland, houses and people as _19_ as ants working in the fields," the young man said.

     "What do you feel?" the wise man asked.

     "Everything is _20_ me. I feel I rule the world," the young man answered.

     The wise man said _21_. After a minute, he asked the young man to look _22_ "What do you see this time?" the wise man asked.

     "I see _23_ flying around high mountains, the white clouds on the mountains and the _24_ sky above the white clouds," the young man answered.

     Then he asked the wise man's _25_

     "I feel small and powerless," the wise man answered. "A person who knows to look upward can _26_ understand his position(位置). When a person knows the blue sky is always overhead, he won't be so _27_ as to believe he rules over the world or other people. "

The young man felt foolish(愚蠢的) for his _28_. From then on, _29_ he began to feel as if the world owed (亏欠) him something, he looked up at the sky and remembered _30_ small he really was. Try to look upward when you feel too good about yourself.

16. A. busy          B. lazy                 C. wise               D. hard-working

17. A. if             B. but                 C. so                 D. or

18. A. got to           B. got off              C. arrived in            D. got up

19. A. fat              B. light                C. small               D. strong

20. A. below         B. above               C. between            D. against

21 A. everything      B. anything             C. something           D. nothing

22. A. up            B. down               C. out                 D. after

23. A. monkeys       B. tigers                C. chicks              D. birds

24. A. red             B. blue                C. green               D. black

25. A. ways           B. name               C. feelings             D. address

26. A. badly           B. angrily              C. hardly               D. clearly

27. A. clever           B. smart              C. silly                 D. useful

28. A. pride            B. success            C. luck                D. smell

29. A. whatever        B. whenever           C. wherever            D. however

30. A. why            B. where              C. how                D. what

When you write a letter or make a telephone call, your words 16 a message. People communicate with words. Do you think you can communicate 　　17 words? A smile 18 your face shows you are happy and friendly. Tears in your eyes tell 19 　 that you are sad. When you 　20 your hand in class, the teacher knows you want to say something 　21 ask questions. You shake your head, and people know you are saying no. You nod and people know you are saying 　22 .

Other things can also give some information. For example, a sign at the bus stop helps you to know which bus 23　 .A sign on the wall of your school helps you to find the library. Signs on doors tell you 24 to go in or out. 25 you ever noticed that there are a lot of signs around you and that you receive messages 　26 them all the time? People can communicate 　27 many other ways. 28 artist can use his drawings to tell about beautiful mountains, about the blue sea and many other things. Books 29 to tell you about all wonderful things in the world and also about people and their ideas. Books, magazines, TV and radio and films all help us to communicate with other people. They all help us to know 30 is going on in the world.

（ ）16.A. take　　 　　 B. bring　　 　　　 C. carry　　　 　　　 D. gives

（ ）17.A. by　　　 　　 B. with　　　 　　 C. use　　　　 　　　 D. without

（ ）18. A. in　　　 　　 B. on　　　 　　　 C. at　　　 　　　　　　 　　　 D. over

（ ）19.A. others　 　　 B. the others　　　　 C. other　　　 　 　　　 D. the other

（ ）20. A. put on　 　　 B. put out　　　　　　 　 C. put up　　　 　　　 D. put down

（ ）21. A. when　 　　 B. or　　　 　　　 C. but　　　　 　　　 D. if

（ ）22. A. no　　　 　　 B. hello　　 　　　　 C. yes　　　 　　　 　　　 D. nothing

（ ）23. A. to get　　 　 B. to choose 　　　　 C. to have　　　 　　　 D. to take

（ ）24. A. which　 　　 B. where　　 　　 C. how　　　　 　　　 　　　 D. what

（ ）25. A. Do　　 　　 B. Did　　　 　　　 C. Had　　　　 　　　 D. Have

（ ）26.A. from　　 　　 B. of　　　 　　　 C. about　　　 　 　　　 D. for

（ ）27. A. with　　 　　 B. by　　　 　　　 C. without　　 　 　　　 D. in

（ ）28. A. The　　 　 B. An　　　 　　　 C. A　　　　 　　 　　　 D. Some

（ ）29. A. write　　 　 B. wrote　　　　　　　 C. is written　　 　　　 D. are written

（ ）30.A. what　 　　　　 B. which　　 　　　 C. that　　　　 　　　 D. who

How to save a life

  The students at No.19 Middle School were having a class. Suddenly, a curtain（窗帘）went on fire and the fire spread quickly. Some students were burned.

  Not really! This was a fire drill（消防演习）that took place in the school on April 28.After the drill, experts from the Red Cross gave a lesson to 400 students on how to deal with some injuries, such as burns and bleeding.

  May 8 is World Red Cross Day. Let’s learn the steps for how to save lives.

  When there is an accident, remember Dr. ABC.

  1).___66____ -Check the area to see that you are not putting yourself or the hurt person in any more danger. For example, check that there are no loose electric cables（松弛的电线）。

  2). ___67____-Call out to the hurt person or shake him or her to see if he or she is conscious（有意识的）.

  3).___68____-If the hurt person is not responding, tip back his or her head and open the mouth. Remove anything that might be blocking the airway.

  4). ____69____– Put your ear to the person’s mouth to hear if he or she is breathing, and watch to see if his or her chest is rising and falling. If he or she is breathing, ensure that he or she is in a stable side position.

  5). Circulation (血液循环) – Feel and look at the person to try and judge if his or her circulation has stopped. If he or she is cold, or has turned pale or blue, it is likely that there is no circulation.

A. Response（反应） B. Breathing   C. Danger    D. Airway（通风）

70.When is World Red Cross Day?

A. On April 28     B. On May 8     C. On May 9     D. On May 1