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uter space 2construction 3large 4make or shapeWatchingPart1ⅠCrop circles,Who or what ,Unusual constructionsⅡTFFFTPart2Ⅰresearcher ,enormous ,manmade ,mysterious ,appearⅡ 1,1990,95,2Ⅲ 1,I’m going to try and find out what this puzzle’s all about 2,It’s so enormous that you can’t even see the other side 3,People couldn’t have made such an enormous circle 4,A circle of ice is missing from abody of water 5,A connection between these mysterious circles almost certainly existsPart3ⅠEBDACⅡin ,to ,of ,in ,aboutFollow upⅠclean and open ,stomper boards ,eveningReading ComprehensionCACBBAC materials ,art ,TimingHome ListeningⅠCBCCB Ⅱarticle ,important ,widespread ,impression ,responsible forⅢ1,This simply wouldn’t happen if people were using stomper boards 2,Crop circles have been documented in more than 29 countries 3,This is a serious error in judgment on the part of this newspaper 4,They are not the result of visits by extraterrestrial beings 5,I discovered a Web site that describes exactly how to make crop circlesUNIT10Warming upⅠmeteorologists ,tornadoes ,phenomena ,forecast ,velocityⅡCFGBADEWatchPart1ⅠA,AB,B,B,ABⅡ6 ,45 ,pressure ,direction ,temperature ,humidityⅢ 1,Tornadoes are some of the least understood phenomena in nature 2,Scientists have been trying to understand how and when tornadoes form 3,They’re searching for information that will help scientists better forecast tornadoes 4,Samaras and his group head straight for the center of the storm 5,Samaras keeps six weather probes ,each weighing 45 poundsPart2ⅠCarsten Peter ,National Geographic photographer ,Take pictures ,photographic probe ,still camerasⅡchallenges ,a big problem ,speedy ,catch up with ,zigzag around ,difficult ,makes it ,The hardest partPart3Ⅰ1,BC 2,AD,3EⅡFFFTTPart4ⅠTTFFFⅡ1fiveten ,2ampm,3carshouses ,4increasesdrops ,5outsideinsideFollow upⅠDFBGAEHCReading ComprehensionCBDAADC 300miles ,in the path ,scientific probe ,photographic probeHome ListeningⅠplace hightech weather probes ,collect the ,information ,directly in the path ,wind velocity ,does most of the damage ,upper part ,bottom ,a better chance of survivingⅡJune 11 ,5 ,16 onethousandths\ ,115 ,200Ⅲ 1,They place hightech weather probes in the paths of tornadoes 2,This enabled them to illustrate exactly what happens inside of atornado3,This is part of the storm which actually does most of the damage 4,The winds in this area of the storm are the strongest5,Scientists were then able to accurately determine the velocity of the objects