单选题Whatarethetwospeakersprobablytalkingabout?

单选题When Mark went to Tom after the game, _______.

单选题The lady over there is ______. A. Jane and Mary mother B. Jane and Mary's mother C. Jane's and Mary's mother D. Jane's and Mary mother

单选题Say, I'm serious. Do not regard it as a ______.

单选题

单选题阅读下列短文，从每题所给的四个选项(A、B、C和D)中选出最佳选项。{{B}}A{{/B}} Forces other than damaging winds are also at work inside tornadoes. Sometimes, as the twisting funnel passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado. The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house the air pressure is normal, a bout 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pres sure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57 600 pounds. The pressure on the four walls adds up to 172 800 pounds. If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and out side the building. But if the windows are shut tightly, the enormous inside pressure may cause the building to burst. Unfortunately, heavy rain and hail often occur in thunderstorms that later produce tornadoes. So people frequently shut all windows to protect their property. This may cause far worse damage later. For the same reason, tornado cellars must have an air vent. Otherwise, the cellar door might be blown out when a tornado passes over it.

单选题—________ will we have to go?—Just one mile. Keep walking!

单选题He ______ to invest(投资) 10 million dollars to have new classroom buildings built for the children in the mountain area.

单选题Oh, Robert. ______ you gave us![A] How a nice surprise[B] What a nice surprise[C] How nice surprise[D] What nice surprise

单选题{{B}}E{{/B}} EVENTS {{B}}Bicycle tour and race{{/B}} A bike tour and race will be held on July 26 and 27 ( Sat. & Sun. ). At 4:30 a.m. the riders will leave Tiananmen Square and ride the first 35 kilometers as a training {{U}}leg{{/U}}. Then the next 55-ki-lometre leg, from Yanjiao to Jixian, will be the first competitive (竞争性的) part of the tour. The riders and their bikes will then be taken from Jixian to Changli. The second racing leg of the tour will be from Changli to the seaside at Nandaihe, covering a distance of 20 kilometers. Saturday night includes the stay at Nandaihe and supper. Sunday morning is free at the seaside. At noon ail the people and their bikes will be taken back to Beijing. Cost: 200 yuan Telephone: 4675027 {{B}}Brazilian footballers{{/B}} The Brazilian Football Club will play Beijing Guoan Team at the Workers Stadium on July 26. The club has several national team players. Also coming is 1994 US World Cup star Romario who has promised to play for at least 45 minutes. Ticket prices: 60 yuan, 100 yuan, 150 yuan Time/Date: 4:30 p. m. , July 26 ( Sat. ) Telephone: 5012372 {{B}}Rock climbing{{/B}} The Third National Rock Climbing Competition will be held on July 26～27 at the Huairou Mountain climbing Training Base. More than 10 teams from Beijing, Wuhan, Daiian, Jilin and other places will take part in it. A Japanese team will give an exhibition of climbing. Free for spectators (观众). Take a long-distance bus from Dongzhimen to Huairou. Time/Dates:9～12 a. m. , July 26 and 27 Telephone: 7143177, 7144850, Wang Zhenghua

单选题This article mainly tells about the story of______.

单选题The damage______by the flood was so large that the buildings cannot be rebuilt in a short time. A. to be caused B. causing C. caused D. was caused

单选题--Do you know who invented ______ telephone?--No, But it is really ______ telephone?

单选题What did people once think about lightning?

单选题For thousands of years people thought of glass 1 something beautiful to look at. Only recently 2 come to think it of something 3 . Shops display their goods in large. 4 windows. Glass bottles and jars 5 food and drink allow us 6 the contents. Glass 7 spectacles, microscopes, telescopes and many other very useful and necessary things. 8 , or glasses, are used by people who cannot see 9 or by people who want to 10 their eyes from bright light. Microscopes make tiny things 11 so that we can examine them. Telescopes make objects that are far away appear 12 to us. 13 in recent years plastics have replaced glass under conditions 14 glass might be 15 broken, there are new uses 16 for glass that 17 never imagined in the past. Perhaps the greatest advantage of glass is 18 its parts are 19 and can be found 20 the world.