global warming 　　few people now question the reality of global warming and its effects on the world's climate. many scientists ______ (1) the blame for recent natural disasters on the increase ______ (2) the world's temperatures and are convinced that, more than ______ (3) before, the earth is at ______ (4) from the forces of the wind, rain and sun. ______ (5) to them, global warming is making extreme weather events, ______ (6) as hurricanes and droughts, even more ______ (7) and causing sea levels all around the world to ______ (8). 　　environmental groups are putting ______ (9) on governments to take action to reduce the ______ (10) of carbon dioxide which is given ______ (11) by factories and power plants, thus attacking the problem at its source. they are in ______ (12) of more money being spent on research into solar, wind and wave energy devices, which could then replace existing power ______ (13) 　　some scientists, ______ (14), believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow, we would have to wait ______ (15) hundred years to notice the results. global warming, it seems, is here to stay. 　　51. a. position b. practice c. blame d. question 　　52. a. at b. by c. in d. about 　　53. a. when b. where c. what d. that 　　54. a. threat b. danger c. harm d. risk 　　55. a. it b. them c. these d. those 　　56. a. just b. even c. such d. well 　　57. a. strict b. stable c. severe d. silent 　　58. a. raise b. fall c. lift d. rise 　　59. a. facing b. putting c. keeping d. reducing 　　60. a. deal b. amount c. number d. count 　　61. a. thus b. yet c. but d. and 　　62. a. belief b. favour c. reguest d. suggestion 　　63. a. change b. build c. fill d. replace 　　64. a. therefore b. however c. although d. despite 　　65. a. hear b. notice c. guess d. apply 　　參考答案：dcddb ccdbb abdbb