单选题A Powerful Influence There can be no doubt at all that the Internet has made a huge difference to our lives. Parents are worried that children spend too much time playing on the Internet, hardly 1 doing anything else in their spare time. Naturally, parents are 2 to find out why the Internet is so attractive, and they want to know if it can be 3 for their children. Should parents worry if their children are spending that much time 4 their computers? Obviously, if children are bent over their computers for hours, absorbed 5 some game, instead of doing their homework, then something is wrong. Parents and children could decide how much use the child should 6 use of the Internet, and the child should give his or her 7 that it won"t interfere with homework. If the child is not 8 to this arrangement, the parent can take more drastic 9 dealing with a child"s use of the Internet is not much different from 10 any other soft of bargain about behaviour. Any parent who is 11 alarmed about a child"s behaviour should make an appointment to 12 the matter with a teacher. Spending time in front of the screen does not necessarily 13 a child"s performance at school. Even if a child is 14 crazy about using the Internet, he or she is probably just 15 through a phase, and in a few months there will be something else to worry about!

单选题The American antelope possesses remarkable powers of sight and can pinpoint potential danger at tremendous distances.

单选题She seemed to have Udetected/U some anger in his voice.

单选题The Sahara The name Sahara derives from the Arabic word for "desert" or "steppe". At 3.5 million square miles, an area roughly the size of the United States, the Sahara Desert in northern Africa is the largest desert in the world. It spans the continent from the Atlantic Ocean to the Red Sea. Daytime temperatures can reach as high as 130℉. The humidity sometimes gets into the teens. But it can also be as low as 2.5 percent, the lowest in the world. Most of the Sahara receives less than five inches of rain per year, while large areas sometimes have no rainfall at all for years. At the heart of the Sahara is the landlocked north African country of Niger. Here the sand dunes can be 100 feet tall and several miles long. Here sand plains stretch over an area larger than Germany where there is neither water nor towns. Yet sitting in the midst of the surrounding desert is the town of Bilma. Suddenly there are pools of clear water. Surprisingly, there are groves of date palms. Underground water resources, or oases, sufficient to support irrigated agriculture are found in dry stream beds and depressions. Irrigation ditches run off a creek to water fields. Corn, cassava, tea, peanuts, hot peppers, and orange, lime, and grapefruit trees grow in these fields. Donkeys and goats graze on green grass. The Sahara of Niger is still a region where you can see a camel caravan of 500 camels tied together in loose lines as long as a mile, traveling toward such oasis towns. There a caravan will collect life-sustaining salt, which is mined from watery basins, and transport it up to 400 miles back to settlements on the edges of the desert. The round trip across the vast sands takes one month.

单选题A lot of people could fall ill after drinking contaminated water.A. muddledB. pollutedC. mixedD. troubled

单选题Hitchhiking (搭车旅游) When I was in my teens (十几岁) and 20s, hitchhiking was a main form of long-distance transport. The kindness or curiosity of strangers 1 me all over Europe, North America, Asia and southern Africa. Some of the lift-givers became friends, many provided hospitality 2 the road. Not only did you find out much more about a country than 3 traveling by train or plane, but also there was that element of excitement about where you would finish up that night. Hitchhiking featured importantly in Western culture. It has books and songs about it. So what has happened to 4 ? A few years ago, I asked the same question about hitchhiking in a column on a newspaper. 5 of people from all over the world responded with their view on the state of hitchhiking. "If there is a hitchhiker"s 6 it must be Iran," came one reply. Rural Ireland was recommended as a friendly place for hitchhiking, 7 was Quebec, Canada—"if you don"t mind being berated (严厉指责) for not speaking French." But while hitchhiking was clearly still alive and well in many parts of the world, the 8 feeling was that throughout much of the west it was doomed (消亡). With so much news about crime in the media, people assumed that anyone on the open road without the money for even a bus ticket must present a danger. But do we 9 to be so wary both to hitchhike and to give a lift? In Poland in the 1960s, 10 a Polish woman who e-mailed me, "the authorities introduced the Hitchhiker" Booklet. The booklet contained coupons for drivers, so each time a driver 11 somebody, he or she received a coupon. At the end of the season, 12 who had picked up the most hikers were rewarded with various prizes. Everybody was hitchhiking then." Surely this is a good idea for society. Hitchhiking would increase respect by breaking down 13 between strangers. It would help fight 14 warming by cutting down on fuel consumption as hitchhikers would be using existing fuels. It would also improve educational standards by delivering instant 15 in geography, history, politics and sociology.

单选题When snow collects on top of a building during the winter, the weight sometimes weakens the construction and occasionally causes the roof to collapse. A. selects B. scatters C. melts D. accumulates

单选题The second injection should have been given once the first drug had {{U}}taken effect{{/U}}.

单选题I Urarely/U wear a raincoat because I spend most of my time in a car.

单选题It is the movement, not the color, of objects that excites the bull.

单选题Nothing would induce me to vote for him again.

单选题He doesn't like the children who are prone to telling a lie.A. reliableB. liableC. promisingD. declined

单选题The two girls look Ualike/U.

单选题We have to ask them to quit talking in order that all people present could hear us clearly.A. decreaseB. ceaseC. continueD. keep

单选题Can you give me a concrete example to support your idea?A. specialB. goodC. realD. specific

单选题Did anyone call when I was out? A. everyone C. nobody B. someone D. anybody

单选题When the car accident happened, we were all horrified. A. take out B. take place C. take in D. take away

单选题You look smart in the new suit.

单选题John removed his overcoat.

单选题When We Are Asleep Everyone dreams, but some people never recall their dreams, or do so very rarely. Other people always wake up with vivid recollections (记忆) of their dreams, though they forget them very quickly. In an average night of eight hours" sleep, an average adult will dream for around one hundred minutes, probably having three to five dreams, each lasting from ten to thirty minutes. Scientists can detect when someone is having a dream by using an instrument which measures the electrical waves in the brain. During dreaming, these waves move more quickly. Breathing and pulse rate also increase, and there are rapid eye movements under the lids, just as though the dreamer were really looking at moving objects. These signs of dreaming have been detected in all mammals (哺乳动物) studied, including dogs, monkeys, cats, and elephants, and also some birds and reptiles (爬行动物). This period of sleep is called the "D" state for around 50% of their sleep; the period reduces to around 25% by the age of 10. Dreams take the form of stories, but they may be strange and with incidents not connected, which make little sense. Dreams are seldom without people in them and they are usually about people we know. One estimate says that two-thirds of the "cast" of our dream dramas are friends and relations. Vision seems an essential part of dreams, except for people blind from birth. Sound and touch are senses also often aroused, but smell and taste are not frequently involved. In "normal" dreams, the dreamer may be taking part, or be only an observer. But he or she cannot control what happens in the dream. However, the dreamer does have control over one type of dream. This type of dream is called a "lucid" (清醒的) dream. Not everyone is a lucid dreamer. Some people are occasional lucid dreamers. Others can dream lucidly more or less all the time. In a lucid dream, the dreamer knows that he is dreaming.