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课时跟踪检测(三十) The power of nature Ⅰ.单项填空 1．(2017·济宁高三模拟)—Jenny, it won't be long before I receive the admission letter from Oxford University. —________ A．Good luck！ B．Congratulations! C．Why so soon? D．Don't worry. 2．(2017·江苏南通二模)Carbon dioxide is said ________ the earth twice as quickly as previously feared. A．to be heated B．to be heating C．to have heated D．to have been heated 3．(2017·湘潭二模)________ around the university, we then were taken to a building, where many scientists worked. A．Showing B．Having been shown C．Being shown D．Having shown 4．(2017·岳阳模拟)—The iPhone 5 has been on the market for some time. Have you got one? —Yes, I ________ one during my visit to Hong Kong. A．have bought B．bought C．had bought D．would buy 5．(2017·山东莱芜高三期末考试)Attracting ________ senior citizens, Florida is ________ home to the largest population of elder Americans. A．/; / B．the; a | 
