Do you know why so many animals do not stay in one place？Birds，fish and other animals move from one place to another place at a certain time．They move for different reasons：most of them move to find food more easily，but others move to get away from places that are too crowded．
17．判断正（A）误（B）题．
Do you try to save electricity（电） and magazines at home？Do you make your bed every day？Read about the home habits of Americans．Are they the same as yours？
26．The passage mainly talks about the home habits of Americans．A
27.80% of Americans go out in the evening with the lights on．A
28．One fifth of Americans keep magazines for years and years．A
29．Most Americans like to keep the rooms clean and tidy．B
30．The people who make the beds are as many as those who wash the dishes every day．B．
Do you try to save electricity（电） and magazines at home？Do you make your bed every day？Read about the home habits of Americans．Are they the same as yours？
| Lights out | Saving magazines |
| Are you careful about saving electricity？25% of people turn off lights when they leave a room.8% never do 80% leave the lights on when they go out in the evening． | How long do you save magazines？About half the population throws away old ones after six months．But 20% keep them for years and years． |
| Clean and tidy | Making beds and doing dishes |
| Are you an organized person？13% of people like to keep the rooms clean and tidy． The common home has fourteen cleaning products around the house． | 74% of people make their beds every morning 5% never do．And 3% actually change their sheets（床单） every day． Do you wash the dishes right after eating？58% of Americans do，but 5% let theirs sit for several days． |
27.80% of Americans go out in the evening with the lights on．A
28．One fifth of Americans keep magazines for years and years．A
29．Most Americans like to keep the rooms clean and tidy．B
30．The people who make the beds are as many as those who wash the dishes every day．B．
14．---Excuse me，could you tell me ________？
---On the Changjiang River．（ ）
---On the Changjiang River．（ ）
| A． | where the accident happens | B． | where the accident happened | ||
| C． | where did the accident happen |
12．All living things on the earth need other living things to live．Nothing live alone．Most animals must live in a group，and even a plant grows close together with others of the same kind．Sometimes one living thing kills another，or one eats and the other is eaten．One kind of life eats another kind of life in order to live，and together they form a food chain（食物链）．All food chains begin with the sun，and all food chains become broken up if one of them disapp ears．
All life needs sunlight to live on．But only plants can use sunlight directly．Plants are"factories"．They make food from sunlight，water and things in the soil and air．
Plants feed all over living thing．Animals can only use the sun's energy （能力） after it has been changed into food by plants，some animals feed directly on plants，other eat smaller animals．Meat-eating animals are only eating plants indirectly．
What about human beings？We are members of any food chain．We eat ice，vegetables，fruits and so on．We also eat meat．But men often break up the food chain．They kill wild animals．They also make rivers，lakes and seas dirty．When these river，lakes and seas are polluted，the fish in then cannot be eaten．If men eat the fish，they will get strange disease．
Each form of life is linked（联系） to all others．Breaking the links puts all life in danger．
41．Food chains suggest thatC．
A．every life needs food．
B．plants are very important
C．no living thing can live alone．
D．living things need different food．
42．From the text we can learn that the sunC．
A．forms a food chain
B．makes animals to grow fast
C．is the beginning of food chains
D．is directly giving us different food
43．What do plants need to grow up？B
A．a；b；c；d
B．b；c；d；e
C．a；b；d；e
D．a；c；d；e
44．Which can change the sun's energy into food？A
A．Plants
B．Humans
C．Plant-eating animals
D．Meat-eating animals
45．The writer is trying to tell us not toB．
A．kill animals．
B．break the links of life．
C．worry about food chains．
D．eat fish from polluted water．
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All life needs sunlight to live on．But only plants can use sunlight directly．Plants are"factories"．They make food from sunlight，water and things in the soil and air．
Plants feed all over living thing．Animals can only use the sun's energy （能力） after it has been changed into food by plants，some animals feed directly on plants，other eat smaller animals．Meat-eating animals are only eating plants indirectly．
What about human beings？We are members of any food chain．We eat ice，vegetables，fruits and so on．We also eat meat．But men often break up the food chain．They kill wild animals．They also make rivers，lakes and seas dirty．When these river，lakes and seas are polluted，the fish in then cannot be eaten．If men eat the fish，they will get strange disease．
Each form of life is linked（联系） to all others．Breaking the links puts all life in danger．
41．Food chains suggest thatC．
A．every life needs food．
B．plants are very important
C．no living thing can live alone．
D．living things need different food．
42．From the text we can learn that the sunC．
A．forms a food chain
B．makes animals to grow fast
C．is the beginning of food chains
D．is directly giving us different food
43．What do plants need to grow up？B
| a．living things b．soil c．water d．sunlight e．things in the air |
B．b；c；d；e
C．a；b；d；e
D．a；c；d；e
44．Which can change the sun's energy into food？A
A．Plants
B．Humans
C．Plant-eating animals
D．Meat-eating animals
45．The writer is trying to tell us not toB．
A．kill animals．
B．break the links of life．
C．worry about food chains．
D．eat fish from polluted water．
