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Climate change is one of the most fundamental challenges ever to confront humanity. Its impacts are already showing and will intensify over time __21__ left unchecked. There is overwhelming scientific evidence, __22__ shown in the Fourth Assessment Report (第四次评估报告的综合报告)of the Intergovernmental Panel on Climate Change (IPCC) 政府间气候变化专门委员会(IPCC), that climate change will threaten __23__ growth and long-term prosperity, as well as the very survival of the most vulnerable populations. IPCC projections indicate that if emissions continue to rise at their current __24__ and are allowed to double from their pre-industrial level, the world will face an average temperature__25__ of around 3°C this century. Serious impacts are associated __26__ this scenario (情景), including sea-level rise, shifts in growing seasons, and an __27__ frequency and intensity of extreme weather events such as storms, floods and droughts.
The United Nations Climate Change Conference in Copenhagen in December in 2009 offers a __28__ opportunity to step up international action on climate change. A Copenhagen deal is __29__ the global transition into green economic growth, and, most urgently, to help the world, especially the most vulnerable, to adapt to impacts __30__ are now inevitable.
(1)、
A：if
B：whether
C：when
D：which
答案： A
(2)、
A：because
B：as
C：while
D：when
答案： B
(3)、
A：economics
B：economical
C：economy
D：economic
答案： D
(4)、
A：speed
B：rate
C：pace
D：rhythm
答案： C
(5)、
A：rising
B：rise
C：raise
D：raising
答案： B
(6)、
A：with
B：to
C：from
D：in
答案： A
(7)、
A：being increased
B：increased
C：increase
D：increasing
答案： D
(8)、
A：history
B：historical
C：historic
D：historically
答案： B
(9)、
A：necessary
B：inevitable
C：essential
D：basic
答案： C
(10)、
A：that
B：of which
C：who
D：what
答案： A
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