文章主題分析：Global Warming來源：考試大
Smoke is clouding our view of global warming, protecting the planet from perhaps three- quarters of the greenhouse(溫室)effect．
cloud v.使不清晰, 使多云，使陰暗;來源：考試大
The sky clouded over.天空中云層密布(clear up v. 放晴)
in the clouds 空想的; 想象的；不真實的；不切實際的來源：考試大
被選擇項分析：
A Atmospheric Scientists
B The Calculations Made at the Berlin Workshop
C The Previous Calculations of the Effect of Aerosols
D The Scientists’Agreement
E The Authoritative Conclusion
F Greenhouse Gases
分析：B和C中一定會有答案出現(xiàn)。來源：考試大
E．分析：該段結構“這是一個具有很大影響的一個結論，在。。地方達成的，由。?？茖W家達成”（注意借助各句子主干內容判斷句子大意），所以判斷E（段落中提到的科學家僅僅是為了給提到的結論增加權威性）是答案。同時可以判斷A是干擾項可以被排除掉。
（A Atmospheric Scientists）
B The Calculations Made at the Berlin Workshop
C The Previous Calculations of the Effect of Aerosols
D The Scientists’Agreement來源：考試大
F Greenhouse Gases
24 Paragraph 3
3 IPCC scientists have suspected for a decade that aerosols(浮質)of smoke and other particles from burning rainforest，crop waste and fossil fuels are blocking sunlight and counteracting the warming effect of carbon dioxide(二氧化物)emissions．Until now，they reckoned that aerosols reduced greenhouse warming by perhaps a quarter, cutting increases by 0．2。C．So the 0．6。C of warming over the past century would have been 0．8。C without aerosols．
C：分析：根據(jù)段落中出現(xiàn)的核心詞aerosols首先判斷C很可能是答案，而且段落倒數(shù)第2句的大意“Until now，they reckoned that…/在此以前，他們一直估計…”，該結構含義與C呼應。
來源：考試大
（A Atmospheric Scientists）
B The Calculations Made at the Berlin Workshop
D The Scientists’Agreement
F Greenhouse Gases
25 Paragraph 4
4 But the Berlin workshop concluded that the real figure is even higher--aerosols may have reduced global warming by as much as three—quarters，cutting increases by 1．8。C．If so，the good news is that aerosols have prevented the world getting almost two degrees warmer than it is now．But the bad news is that the climate system is much more sensitive to greenhouse gases than previously guessed．
B．分析：段首句中出現(xiàn)了Berlin workshop，比較剩下的被選項（對應被選項中的核心詞：D: agreement; F: greenhouse gases）判斷B最合適。
Smoke is clouding our view of global warming, protecting the planet from perhaps three- quarters of the greenhouse(溫室)effect．
cloud v.使不清晰, 使多云，使陰暗;來源：考試大
The sky clouded over.天空中云層密布(clear up v. 放晴)
in the clouds 空想的; 想象的；不真實的；不切實際的來源：考試大
被選擇項分析：
A Atmospheric Scientists
B The Calculations Made at the Berlin Workshop
C The Previous Calculations of the Effect of Aerosols
D The Scientists’Agreement
E The Authoritative Conclusion
F Greenhouse Gases
分析：B和C中一定會有答案出現(xiàn)。來源：考試大
E．分析：該段結構“這是一個具有很大影響的一個結論，在。。地方達成的，由。?？茖W家達成”（注意借助各句子主干內容判斷句子大意），所以判斷E（段落中提到的科學家僅僅是為了給提到的結論增加權威性）是答案。同時可以判斷A是干擾項可以被排除掉。
（A Atmospheric Scientists）
B The Calculations Made at the Berlin Workshop
C The Previous Calculations of the Effect of Aerosols
D The Scientists’Agreement來源：考試大
F Greenhouse Gases
24 Paragraph 3
3 IPCC scientists have suspected for a decade that aerosols(浮質)of smoke and other particles from burning rainforest，crop waste and fossil fuels are blocking sunlight and counteracting the warming effect of carbon dioxide(二氧化物)emissions．Until now，they reckoned that aerosols reduced greenhouse warming by perhaps a quarter, cutting increases by 0．2。C．So the 0．6。C of warming over the past century would have been 0．8。C without aerosols．
C：分析：根據(jù)段落中出現(xiàn)的核心詞aerosols首先判斷C很可能是答案，而且段落倒數(shù)第2句的大意“Until now，they reckoned that…/在此以前，他們一直估計…”，該結構含義與C呼應。
來源：考試大
（A Atmospheric Scientists）
B The Calculations Made at the Berlin Workshop
D The Scientists’Agreement
F Greenhouse Gases
25 Paragraph 4
4 But the Berlin workshop concluded that the real figure is even higher--aerosols may have reduced global warming by as much as three—quarters，cutting increases by 1．8。C．If so，the good news is that aerosols have prevented the world getting almost two degrees warmer than it is now．But the bad news is that the climate system is much more sensitive to greenhouse gases than previously guessed．
B．分析：段首句中出現(xiàn)了Berlin workshop，比較剩下的被選項（對應被選項中的核心詞：D: agreement; F: greenhouse gases）判斷B最合適。