A.Only half of the world’s water can be used. |
B.The world population is increasing faster and faster. |
C.Half of the world’s water resources have been seriously polluted. |
D.Humanity has not placed enough value on water resources. |
A.is already serious in certain parts of the world. |
B.has been exaggerated by some experts in the field |
C.poses a challenge to the technology of building reservoirs(水庫) |
D.is underestimated by government organizations at different levels |
A.be reduced to the minimum | B.stimulate domestic demand |
C.go with its real value | D.take into account the occurrences of droughts |
A.guarantee full protection of the environment |
B.centralize the management of water resources |
C.increase the sense of responsibility of agencies at all levels |
D.encourage local and regional water resources |
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A.medicine | B.communication and transportation |
C.education | D.space technology |
A.Scientific discoveries have only changed man’s moral atmosphere. |
B.Scientific discoveries have only changed man’s material well-being. |
C.Scientific discoveries have helped people find efficient ways of using available resources. |
D.Men are sent to the moon because there are urgent problems that have not been solved on earth. |
A.the moral applications of science | B.the practical applications of science |
C.urgent problems on the earth | D.both A and B |
A.Science discoveries | B.Science and daily life |
C.Advances in transportation | D.City pollution |
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A.Nation | B.Opinion |
C.Science | D.Business |
A.decide who is more likely to enjoy a happier life |
B.find out the link between personality and health |
C.gather information for the National Institutes of Health |
D.compare each woman’s personality changes |
A.Negative emotions cause a shorter life indeed. |
B.There may be some link between personality and health. |
C.It’s uncertain whether optimism affects one’s health. |
D.The more optimistic you are, the longer life you may enjoy. |
A.A woman who always doubts what others say. |
B.A woman who doesn’t exercise. |
C.A woman with high blood pressure. |
D.A woman with poor physical health. |
A.Unfair. | B.Useless. | C.Necessary. | D.Reliable. |
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A.Tourism Causes Bad Effects | B.Tourism Calls for Good Behavior |
C.Vacations Bring a Lot of Fun | D.Vacations Cost More Than You Think |
A.pay attention | B.take care | C.cheer up | D.calm down |
A.tourism is not a promising industry. |
B.dream vacations should be spent abroad |
C.the problems caused by tourism are easy to settle. |
D.tourists should respect local customs and culture |
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A.looking for jobs everywhere | B.a(chǎn)lways feeling excited in movement |
C.enjoying themselves while moving | D.keeping moving from place to place |
A.most people stay | B.a(chǎn)bout one fifth of the people live |
C.the owner of one house stays | D.the owners of five houses stay |
A.is a practice worth trying | B.only does good to workers |
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A.introduce an Internet computer Web site called “blog” |
B.introduce a way of reading on blogs |
C.tell readers about blogs |
D.tell readers how to write blogs |
A.different ideas |
B.medical advice |
C.a(chǎn)dvertisements |
D.a(chǎn)ccount codes |
A.Politicians don’t use blogs at all |
B.A lot of bloggers no longer write or read blogs |
C.Those who like to use blogs are mostly teenage girls |
D.Dave Winer closed his “weblogs.com” because of money shortage |
A.it was created by a woman |
B.it provides plenty of useful information and advice |
C.it is about the history of books |
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A.Hiking is a great way to travel. You will get close to nature and take exercise at the same time. Hiking is easy to do and doesn’t have to be very expensive. You can hike close to home or travel to other places. The basic equipment you need for hiking is simple: good shoes, clothes and a backpack. You can hike in the mountains, in a forest or along a river. You can also go for a hike in the city. Hiking is fun and exciting, but you shouldn’t forget safety. |
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A.not harmful to the health though it is heavy |
B.not harmful to the health because it is light |
C.harmful to the health though it is light. |
D.harmful to the health because it is heavy |
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A.parents are patient when teaching children time |
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C.children are likely to learn time quickly |
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C.the Flick Flak can take children's imagination |
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C.disappointment | D.disadvantage |
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B.it proves to be effective in teaching children time |
C.it is made so as not to be easily damaged by children |
D.it is the children's favorite watch |
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