单选题______ I shouted at the top of my voice did he turn his head toward me. A. Until B. Only till C. Not until D. Till

单选题They regard ______ as their duty to provide the best service for their customers.

单选题The price of the car is very ______. A. low B. cheap C. dear D. expensive

单选题The signal ______, the train started.

单选题We could not have completed the job in time if it ______ for their help.

单选题Another new nation has been ______ being.

单选题 (D) About 16 million people in the United States have lost some of their hearing. About two million others are extremely or completely deaf. They cannot hear speech or most other sounds in their everyday life, even with a hearing aid to make sounds louder. There are several kinds of hearing loss. The first kind results from disease or injury to the outer or middle part of the ear. The damage prevents sound waves from reaching the inner ear. Usually, this form of hearing loss is not extreme. And a hearing aid or medical treatment can often restore hearing. A second kind of hearing loss involves the nerves (神经). It is caused by damage to the inner ear. A loud noise or disease may destroy some of the tiny nerve cells that carry sound. People suffering this kind of damage may lose the ability to hear some sounds, high or low. The third kind of deafness is called a central hearing loss. It is caused by damage to the hearing nerves leading to the brain or in the brain itself. Deafness is the most common bodily disability (残疾) in America. Often nothing can be done to stop it. But many cases can be prevented. One simple thing is responsible for most hearing loss. That one thing is noise. Telephone bells, loud music, machines. In industrial countries, especially, these things make the world very noisy. Studies have shown that old men in quiet African villages have much better hearing than young people in America. Other sources of deafness. include accidents, drugs and illnesses.

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单选题It has been more than six months since we had the opportunity to service your car, and we"ve missed you. So, we are inviting you to bring your car into our shop for a free inspection and adjustment. We hope that you will accept our offer. We have set aside the hours between 8:00 a.m. and 1:00 p.m., Monday through Friday for your convenience.

单选题________ , the Englishman is a quiet, shy, reserved person who is fully relaxed only among people he knows well.

单选题Have a cup of tea, ______?

单选题The earth revolves a little more rapidly ______ it is closer to the sun.

单选题There are two kinds of memory: short-term and long-term. Information in long-term memory can be remembered at a later time when it is needed. The information may be kept for days or weeks. However, information in short-term memory is kept for only a few seconds, usually by repeating the information over and over. The following experiment shows how short-term memory has been studied. Henning studied how students who are learning English as a second language remember vocabulary. The subjects in his experiment were 75 college students. They represented all levels of ability in English: beginning, intermediate, and native-speaking students. To begin, the subjects listened to a recording of a native speaker reading a paragraph in English. Following the recording, the subjects took a 15-question test to see which words they remembered. Each question had four choices. The subjects had to circle the word they had heard in the recording. Some of the questions had four choices that sound alike. For example, weather, whether, wither, and wetter are four words that sound alike. Some of the questions had four choices that have the same meaning. Method, way, manner, and system would be four words with the same meaning. Finally the subjects took a language proficiency test. Henning found that students with a lower proficiency in English made more of their mistakes on words that sound alike; students with a higher proficiency made more of their mistakes on words that have the same meaning. Henning"s results suggest that beginning students hold the sound of words in their short-term memory, and advanced students hold the meaning of words in their short-term memory.

单选题(C) When you learn a foreign language you must learn more than just the words and the grammar. To communicate successfully in speech, you must also learn the non-verbal language, or "body language" of that culture. "Body language" is a term used to describe facial expressions, gestures, and other movements of the body that send messages. This means of communication is so important that we may actually say more with our movements than we do with words. Unconsciously, everyone understands the importance of body language. That"s why we stand on tiptoe (脚尖) in a crowded room to see a speaker"s face and hands, even though we may be able to hear him very clearly. For some messages, words are not enough. Speaking a foreign language is sometimes difficult because we may not understand the non-verbal signals of another culture, or they may mean something very different from what they mean in our culture. For example, nodding the head up and down is a gesture that may communicate a different message in different parts of the world. In North America it means "I agree. " In the Middle East nodding the head down means "I agree" and up means "I disagree. " In a conversation among Japanese it often simply means "I"m listening. " One Japanese student in the U.S. learned the difference the hard way. While speaking with a salesman the student nodded his head politely to show that he was paying attention. The next day the salesman brought a new washing machine to the student"s apartment. Eye contact is also meaningful, but it, too, can mean different things in different countries. In some Spanish-speaking countries, children show respect to an older person by not looking directly into the person"s eyes during a conversation. In other cultures, looking into a person"s eyes is expected. For example, if you don"t do it in the U.S., people may think you are afraid or angry. In the Middle East, direct eye contact during a conversation is more continuous than in many other parts of the world. People who are not used to this may feel uncomfortable.

单选题The police officer’s warm brown eyes, relaxed manner and pleasant smile made him easy ________ .

单选题Scientists have discovered that influenza (流行性感冒) viruses taken from man can cause the disease in animals. In addition, man can catch the disease from animals. In fact, a great number of wild birds seem to carry the virus without showing any evidence of illness. Some scientists conclude that a large family of influenza viruses may evolved in the bird kingdom. There is even convincing evidence to show that virus strains (菌株) are transmitted from place to place and from continent to continent by migrating birds. It is known that two influenza viruses can recombine when both are present in an animal at the same time. This raises the possibility that a human influenza virus can recombine with an influenza from a lower animal to produce an entirely new virus. Research is under way to determine if that is the way that major new stains come into being. Another possibility is that two animal influenza strains may recombine in a pig, for example, to produce a new strain which is transmitted to man then.

单选题The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise (有氧操). Millions of individuals became engaged in a variety of aerobic activities, and literally thousands of health spas developed around the country to capitalize(获利) on this emerging interest in fitness, particularly aerobic dancing for females. A number of fitness spas existed prior to this aerobic fitness movement, even a national chain with spas in most major cities. However, their locus was not on aerobics, but rather on weight-training programs designed to develop muscular mass, strength, and endurance in their primarily male enthusiasts. These fitness spas did not seem to benefit financially from the aerobic fitness movement to better health, since medical opinion suggested that weight-training programs offered few, if any, health benefits. In recent years, however, weight training has again become increasingly popular for males and for females. Many current programs focus not only on developing muscular strength and endurance but on aerobic fitness as well. Historically, most physical-fitness tests have usually included measures of muscular strength and endurance, not for health-related reasons, but primarily because such fitness components have been related to performance in athletics. However, in recent years, evidence has shown that training programs designed primarily to improve muscular strength and endurance might also offer some health benefits as well. The American College of Sports Medicine now recommends that weight training be part of a total fitness program for healthy Americans. Increased participation in such training is one of the specific physical activity and fitness objectives of Healthy People 2000: National Health Promotion and Disease Prevention Objectives.

单选题______ available, we would certainly have sent him to the meeting.

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单选题Thank you for your postcard; it was very ______ of you to send it.