Listening Comprehension

　　Section A

　　11.D 12.B 13.A 14.C 15.B
　　16.C 17.D 18.C 19.D 20.B
　　21.B 22.C 23.A 24.A 25.D

　　Section B

　　26.D 27.A 28.B 29.A 30.C
　　31.B 32.D 33.B 34.B 35.B

　　Section C

　　 als ate 39. balanced
　　40. competition 41. exchange 42. process 43. environmental
　　44. These "greenhouse gases" trap heat in the atmosphere and are blamed for changing the world's climate.
　　45. But currently, nations producing only 44 percent have approved the Protocol. Russia produces about 17 percent of the world's greenhouse gases.
　　46. To join the W.T.O., a country must reach trade agreements with major trading countries that are also W.T.O. members.

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