单选题The African way of communication sent messages ______.

单选题—Jerry, will you please go and empty the rubbish? —______?

单选题—"Cars and buses burn oil." —______

单选题Whathappenswhentheyarewalkinginthestreet?

单选题According to Paragraph 3, diners changed in ________.

单选题Having an adventure in the forest gave me a chance to use all the training I______. A. receive B. had received C. will receive D. have received

单选题--I always get lost driving on this fly-over.--Funny you should say that; something ______ happened to me once.

单选题Joseph is at the stage ______ he can say single words but not full sentences.[A] that[B] which[C] what[D] where

单选题According to the passage, Emperor penguins fight against each other for ______.

单选题Almost every family buys at least one copy of a newspaper every day. Some people subscribe(订阅) to as many as two or three newspapers. But why do people read newspapers? Five hundred years ago, news of important happenings-battles-lost and won, kings or rulers overthrown (推翻) or killed-took months and even years to travel from one country to another. The news passed by word of mouth and was never accurate. Today we can read in our newspapers of important events that occur in far away countries on the same day they happen. Apart from supplying news from all over the world, newspapers give us a lot of other useful information. There are weather reports, radio, television and film guides, book reviews, stories and, of course, advertisements. The bigger ones are put in by large companies to bring attention to their products. They pay the newspapers thousands of dollars for the advertising space, but it is worth the money, for news of their products goes into almost every home in the country. For those who produce newspapers, advertisements are also very important. Money earned from advertisements makes it possible for them to sell their newspapers at a low price and still make a profit. Newspapers often have information on gardening, cooking and fashion as well as a small but very popular section on jokes and cartoons(漫画).

单选题WhydoesJanewanttoleaveherpresentjob?A．Becauseshedoesnotlikethejob.B．Becauseshewantstodosomethingdifferent.C．BecauseshedoesnotwanttoliveoutsideLondon.

单选题Atwhattimeoftheyeardoesthisconversationtakeplace?

单选题The boys looked for the ball for a while in the playground, but finally gave are went home. A. up B. out C. away D. off

单选题What'sthemeaningof"anativeofL6ndon"?

单选题A preschool teacher teaches the children ______.

单选题I checked all my answers __________ my teacher had suggested.

单选题To fight a noise by making more noise sounds strange, but that"s exactly what motor engineers are doing in Germany and some other countries. Car makers" research and development laboratories have already proved that mixing more noise with the help of loudspeakers can reduce the unwanted noise. Physicists have known about the technique for a long time. Sound is made up of pressure waves in the air. If two sound waves of the same frequency (频率) mix so that the highest point of one wave happens at the same time as the lowest point of the other wave, the result is no sound. Therefore, by producing a perfect copy of the noise and delaying it by half a wave cycle (周期), we can kill the unwanted noise. Using this technique many carmakers are racing to develop noise-killing systems (系统) both inside and outside the cars. Another good thing about the use of noise-killing systems is that it saves the need for a silencer; this not only reduces the weight of a car, but also makes the motor burn less fuel and work better. Some engineers believe that the noise-killing system will be used in most cars within a few years. But the carmakers haven"t decided if they will carry it into production because it would add several hundred dollars to the cost of their cars.

单选题Howmuchisalargebottleofaspirin?