D
It seems to be strange to you there is a blind spot (盲点)on the eyes. Here is an interesting experiment that can make something disappear, when one eye is open.
Make a card about the size of a postcard and write two English letters L and R on it, L on the left and R on the right. First, hold the card about 80 cm away and you see both the letters. Then close your right eye and look at the letter R only with your left eye. And now, as you move the card slowly towards you, you’ll find the letter L disappearing. But if you move the card nearer to your face, the letter will be seen again. Now do the same experiment with your left eye closed, you’ll find the letter R disappearing.
Why does the letter disappear? It is because there is a blind spot on the eye. When the image (影像) of the letter falls on the blind spot, it won’t be seen. That is why either of the letters disappears.
56. The writer of the passage thinks that ________ there is a blind spot on the eye.
A. few people know  B. no one knows  C. most people know  D. all the people know
57. The word “disappear” in the passage means ________ in Chinese.
A. 驱散   B. 消散   C. 消失   D. 遗失
58. You fail to see the letter L in the experiment because ________.
A. your eyes are poor       B. its image falls on the blind spot
C. your left eye is not open   D. you move it close to your eye
59. In which order (顺序) should you do the experiment?
①Hold the card  ②Move the card nearer  ③Close your right eye 
④Write two English letters  ⑤Look at the letter R  ⑥Make a card
A. ④⑥①②③⑤ B. ①③⑥④⑤② C. ⑥①④③②⑤ D. ⑥④①③⑤②
60. The passage mainly (主要) tells us ________.
A. how to find the blind spot    B. an interesting experiment 
C. where the blind spot is       D. there is a blind spot on the eyes

E
How many things can you see in the night sky? A lot! On a clear night you can see the moon, some planets, and thousands of sparking stars.
     You can see even more with a telescope（望远镜）. You might see that many stars look larger than others. You might see that some stars that look white are really red or blue. With bigger and bigger telescopes you can see more and more objects in the sky. And you can see those objects in more and more detail.
    But scientists believe there are some things in the sky that we will never see. We won’t see them with the biggest telescope in the world, on the clearest night of the year. That’s because they’re invisible. They’re the mysterious dead stars called black holes.
     You might find it hard to imagine that stars die. After all, our sun is a star. Year after year we see it up in the sky, burning brightly and giving us heat and light. The Sun certainly doesn’t seem to be getting old or weak. But stars do burn out and die after billions of years.
     As a star’s gases burn, they give off light and heat. But when the gases run out, the star stops burning and begins to die.
So next time you look up at the night sky, remember: there’s more in the sky than we can see!
61.On a clear night we might see things except______.
A. the moon       B.some planets      C.sparking stars      D.the sun
62. How can we see even more in the sky?
A.By using a telescope                      B.By using a microscope   
C.By climbing up to the top of a mountain      D.By going outside on a clear night.
63.What does the underlined word”invisible”mean in Chinese?
A.看不见的        B.听不见的        C.摸不着的         D.无形的
64.When a star’s gases_______,the star begins to die.
A.burn           B.run out        C.give off heat        D.get weak
65.Which of the following is NOT TRUE according to the passage?
A.We might see that many stars look larger than others with a telescope
B.We might see that some stars that look white are really red and blue with a telescope.
C.We can see some objects in more and more detail with bigger and bigger telescopes.
D.The sun certainly seems to be getting old and weak.
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