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短文填空
The most important drink is water．Not many people understand this but it is quite t 1 ．People can l 2 for a long time without food, but they will die if two or three days w 3 water．In h 4 weather, many people do not drink e 5 water, because they don't know how much water they n 6 ．After t 7 exercise, people need more water．
The water in man's body is m 8 more than other matters(物质)．We'd better have enough water, or we may get i 9 ．Water is n 10 to all the living things．There will be no l 11 if there is no water．
So we must save water and don't w 12 water．
根据短文内容及首字母提示填写所缺单词
This is a street crossing(十字路口)．There are red and g 1 lights at each corner(交叉路口)．Drivers must watch the light c 2 ．
When there is a green light, the cars may go on．When there is a red light，the cars must s 3 ．They must wait u 4 the red light changes to green．Then they can go on．Sometimes the cars want to make a right t 5 or a left turn．They can make a r 6 turn when the light is green or red．But they must wait until the green light is shining if they want to turn l 7 ．
Some people are color blind(色盲)．They cannot see the d 8 between red and green．These people must not d 9 , or else there will be accidents(事故)．We must keep our streets s 10 ．
短文填空
The most important drink is water．Not many people understand this but it is quite t 1 ．People can l 2 for a long time without food, but they will die if two or three days w 3 water．In h 4 weather, many people do not drink e 5 water, because they don't know how much water they n 6 ．After t 7 exercise, people need more water．
The water in man's body is m 8 more than other matters(物质)．We'd better have enough water, or we may get i 9 ．Water is n 10 to all the living things．There will be no l 11 if there is no water．
So we must save water and don't w 12 water．
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Is the sky blue? The sky has no colour. We know that there is air around the world. When planes fly，they need air to lift their wings(翅膀).Planes cannot fly very high because when they go higher，the air gets thinner. If we go up about l 200 kilometers from the earth，we find there is no air.
Perhaps we can answer some of our questions now. The sky is space. In this space there is
only the sun，the moon and all the stars.
根据短文内容选择正确答案:
1.What is the sky?( )
A. It’s the clouds. B. It's space.
C. It’s air. D. It’s nothing.
2.They sky________.( )
A. is blue B. is white
C. is black D. has no colour
3.A plane cannot fly very high because________.( )
A. the air becomes thinner
B. the flying machine is not good
C. people Will be afraid if the planes fly too high
D. it is not necessary for planes to fly so high
4.If we go up about l 200 kilometers from the earth，we find________.( )
A. there is more air B. there is 1ess air
C. there is nothing but air D. there is no air
5.In space there is________.( )
A. nothing B. air everywhere
C. everything D. only the sun. the moon and all stars
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