閱讀理解
       Light and shadow are friends. They usually go together. We receive light every day. At the same time, we produce shadow.
       Light cannot shine through you. Your body stops it from passing. There is a dark spot on the ground
next to you. The light cannot reach the dark spot. This is your shadow.
       At noon the sun shines over your head. Your body stops very little light from reaching the ground.
       We love light, especially sunlight. Without sunlight, life on earth is impossible. Most of us like to stand
in the shadow of a tree in summer. But some people are afraid of their own shadow at night. They do not want to walk in a dark street. They do not want to see the shadow, either. But still light and shadow usually go together.
1. The sentence "Light and shadow are friends" means ____.
A. the shadow produce light
B. the light usually follows the shadow
C. they usually get on well with each other
D. when we get light, we can get shadow. They are always together.
2. Light cannot shine through you because  ___.
A. it is too weak
B. your body stops it from traveling on
C. your body is tall and strong
D. there is a dark spot on the ground next to you
3. Your body's shadow is long because ____.
A. the sun is low in the sky in the morning or late afternoon
B. the sun is over your head
C. the sunlight is very strong at noon
D. your body stops very little light reaching the ground
4. It is  ___ in the shadow of a tree in summer; so many people like to stay there.
A. hot
B. warm
C. cool
D. cold
5. Which of the following is not true?
A. There will be no shadow without light.
B. Shadow is produced when something stops the light from passing.
C. We produce light when we receive it.
D. Man, animals and plants have to live on sunlight.
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　　I wonder if there is any girl or boy who does not like to see a rainbow (彩虹) in the sky. It is so beautiful.

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　　There are many colours in nature．But do you know if a colour has weight?I think you'll say“no”．But I am afraid you are wrong．If you don't believe, you may do a small experiment．

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