Light and shadow（影子）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（斑點(diǎn)）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 reaching the ground．So your shadow is quite short．

　 But in early morning or late afternoon the sun is low in the sky． Its light moves over more of your body．Then your shadow is quite long．Your body keeps a lot of light from reaching the ground．

We love light, especially（尤其）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．your body stops very little light reaching the ground

D．the sunlight is very strong at noon

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．Many animals and plants have to live on sunlight．

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