What is the sky?Where is it?What lies above the sky?I am sure that you have many questions about the sky．Some of them are very difficult to answer, aren't they?
If someone asks you,“What colour is the sky?”Perhaps you would answer,“Blue．”That would be wrong．The sky has no colour．
Is the sky full of air?Yes, there is air all over the world．We could not live without air．Planes cannot fly very high because as they go higher, the air gets thinner．If we go far enough away from the earth, we find there is no air．
Perhaps we can answer some of the questions now．What is the sky?The sky is the air．Where is it?It is all around the world．In this space there are the sun, the moon and all the stars．
(1)
You have ________ questions about the sky．
[ ]
A．
no
B．
a few
C．
many
D．
four
(2)
The sky is ________．
[ ]
A．
blue
B．
any colour
C．
white
D．
no colour
(3)
We could not live ________ air．
[ ]
A．
in
B．
with
C．
without
D．
no
(4)
The plane cannot fly very high, because the air gets ________ in the higher space．
Tom 1 some new colour pencils in his pencil-box．What colour are they? Let’s have 2 ．They are red, black, blue, white, purple, orange 3 green．Tom likes 4 very much．He draws 5 with them．Now he is drawing a house．The door is green．The walls 6 White．The windows are big．It’s very nice．There are many flowers 7 the house．There is 8 black and white sheep behind the house．It is eating grass．Are there 9 other animals in the picture? Yes, there are．
We all like the picture．We want to put it 10 the wall of our classroom．
