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(C) Trees are useful to man in three important ways : they give him wood and other useful things,they give him cool places,and they help to stop drought (干旱) and flood.
Unluckily,in many parts of the world,man has not found that the third of these points is the most important. Man wants to make money from trees,so he has cut them down in large numbers,only to find that without them he has lost the best friends. And also, he is usually too careless to plant and look after new trees. So the forests slowly disappear.
This does not only mean that man will have fewer trees. The results are even worse; for where there are trees,the earth is stopped from being washed away easily ; but where there are no trees,the rain falls on hard ground and runs away,causing floods and carrying away the rich top-soil. When all the top-soil is gone,nothing is left but useless desert (沙漠) .
() 7. The most important point of threes to man is .
A. they help him to make money
B. they give him cool places
C. they give him wood and other things
D. they help him to stop drought and floods
() 8. In many places forests slowly disappear because .
A. many trees have been cut down by man
B. new trees are not well looked after
C. man has not paid enough attention to planting trees
D. all the above
() 9. Land becomes desert after all trees are cut down because .
A. there is less rain B. there is more rain
C. strong winds bring a lot of sand D. the earth is easily washed away
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7. Cindy often ( write) diaries in Chinese,but she doesn’t do it now because she thinks it is difficult.
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7. Peter is busy these days. I suppose he (work) hard for his coming exani,right?
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6. — Dear!Why didn't you answer my telephone?
——Sorry!I ( attend) an important meeting then. My mobile phone was left in my office.
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