Unit 22 Environmental Protection Period One Warm-up and
Lesson 1 课时精练（北师大版选修8，课标通用）
时间：45分钟
Ⅰ.用适当的介、副词填空
1．Because ________ the greenhouse effect, the Earth is warmed by gases trapped ________ the atmosphere.
2．Global warming is an increase ________ time of the average temperature ________ the Earth.
3．Global warming refers ________ an average increase in the Earth's temperature that, in turn, leads ________ climate change.
4．The amount of carbon dioxide ________ the atmosphere has risen ________ more than 30% in the last 250 years ________ half of this increase occurring since 1960. 5．Many experts insist that the blame ________ this global warming can mostly be pinned ________ human activities.
6．If we continue to produce carbon dioxide and other gases ________ such huge quantities, we are condemning life ________ Earth.
7．Serious diseases will spread and industries that rely ________ nature such ________ fishing will be badly affected.
8．If less carbon dioxide goes ________ the atmosphere，global warming will slow ________.
9．Even simple things like using recycled paper or switching ________ the lights when you leave a room can help.
10．If we add ________ all these small changes made ______ everyone worldwide，they won't be such small changes.
答案 1.of；in 2.over；of 3.to；to 4.in；by；with 5．for；on 6.in；on 7.on；as 8.into；down 9.off 10．up；by Ⅱ.单词拼写
1．Because of the greenhouse effect，the Earth is warmed by gases ________(困在) in the atmosphere.
2．Overfishing is harmful to the ________(生态) of the sea. 3．Breweries are often built in nature ________(保护区)．
4．In the last few decades，scientists have reached ________(一致的意见) that human beings are causing changes in the Earth's climate.
5．How is global warming ________ (与……相联系) to our lives?
6．Without these naturally occurring gases，the sun's rays would b________ back into space.
7．If you continute to produce CO2 and other gases，you are c________ life on Earth. 8．Many people believe that they are simply not prepared to s________ the amount of money they make from industry to save the Earth.
9．They suggest making small changes like taking public transport and r________. 10．After all，there's no s________ for our Earth. 答案 1.trapped 2.ecology 3.reserves 4.consensus 5.relevant 6.bounce 7.condemning 8.sacrifice 9.recycling 10.substitute Ⅲ.佳句翻译与仿写
1．In the last few decades，scientists have reached consensus and reported that human beings are causing changes in the Earth's climate—something previously seen as beyond our control.
翻译：__________________________________________________________ ________________________________________________________________ 仿写：在过去的四年里，汤姆游遍了中国的大部分城市。
____________________________________________________________ ______________________________________________________________ 2．Looking ahead，scientists believe that global warming could be one of the biggest environmental problems facing the 21st century.
翻译：____________________________________________________________ _________________________________________________________________ 仿写：受到老师的鼓励后，李华展望未来，充满了信心。
________________________________________________________________ ______________________________________________________________ 3．Without these naturally occurring gases，the sun's rays would bounce back into
space leaving the Earth cold and impossible to live on.
翻译：__________________________________________________________ ________________________________________________________ 仿写：如果地球上没有水，植物就会死亡。
_____________________________________________________________ _______________________________________________________________ 4．As a result of increased industry，agriculture，the cutting down of forests，the increase in transport and the burning of fuels，nearly 6 tonnes of carbon dioxide goes into the atmosphere every year for every one of the Earth's 6 billion people.
翻译：_________________________________________________________ ____________________________________________________________ 仿写：她由于交通阻塞而迟到了。
_______________________________________________________________ _______________________________________________________________ 5．This is no easy task，however，and some governments, for example，the USA's federal government，express reservations about whether global warming is really caused by human activities.
翻译：_______________________________________________________ _______________________________________________________________ 仿写：这种病是否会传染还存有疑问。
There is some doubt as to ____________________________________
___________________________________________________________________. 答案 1.在过去的几十年里，科学家一致认为，人类正在造成地球气候的变化——这是一种原来被认为是超出我们控制能力的现象。
In the last four years，Tom has traveled to most of the cities in China.
2．展望未来，科学家们认为全球变暖可能是二十一世纪所面临的最严重的环境问题之一。
Looking ahead，Li Hua is full of confidence after his teacher encouraged him. 3．如果没有这些自然生成的气体，太阳光线就会反射回太空中，使得地球处于寒冷之中，不适合生物生存。
Plants would die without water on the earth.
4．由于工业、农业(的规模)不断扩大，成片成片的森林被砍伐，交通运输日益频繁，燃料消耗不断增长，对于地球上60亿人口中的每个人来说，每年有大约6公吨的二氧化碳被释放到大气中。 She was late as a result of the traffic jam.
5．这不是一项简单的工作，然而一些政府，例如美国的联邦政府，对于全球变暖是否真正由人类活动引起仍持保留意见。 whether the illness is infectious Ⅳ.单项填空
1．Revise reported speech and practise vocabulary ________ global warming, natural disasters and ________ animals. A．relating to; endangering B．related to; endangering C．relating to; endangered D．related to; endangered
解析 句意：复习间接引语并练习与全球变暖、自然灾害及濒危动物有关的单词。第一空relating to“与……有关”，现在分词短语作定语修饰vocabulary；第二空endangered“濒危的”，修饰animals。因animals与endanger构成被动关系，故用其过去分词作定语。所以应选C项。 答案 C
2．________ the greenhouse effect，the Earth is warmed by gases ________ in the atmosphere.
A．Because; trapping C．Because of；trapping
B．Because; trapped D．Because of；trapped
解析 because引导原因状语从句；because of＋名词或名词短语。由句式结构分析，第一空应用because of，故排除A、B两项；第二空gases与trap之间属被动关系，故应用过去分词trapped修饰gases，所以应选D项。 答案 D
3．Overfishing is harmful ________ the ecology of the sea.
A．for B．on C．to D．with
解析 句意：捕捞过度对海洋生态是有害的。be harmful to sth对……有害。 答案 C
4．So high ________ in several places that many homes are at risk from flooding. A．the water level has risen B．has the water level risen C．the water level is risen D．is the water level risen
解析 句意：一些地方的水平面已经上升得如此高以致于许多住宅有被洪水淹没的危险。so＋adj./adv.置于句首，句子要用部分倒装结构，所以排除A、C两项。rise属不及物动词，不能用被动形式，故应选B项。 答案 B
5．But what exactly is global warming and how is it relevant ________ our lives? A．with B．to C．on D．of 解析 考查固定短语。be relevant to...与……有关。 答案 C
6．Global warming refers to an average increase in the Earth's temperature that，________，leads to climate change. A．in turn C．in short
B. in return D．in case
解析 句意：全球变暖指的是地球温度平均增长，继而导致气候变化。in turn转而；反过来；in return作为回报；in short简言之；in case以防万一。由句意知应选A项。 答案 A
7．Over the last 100 years, the global average temperature ________ by 1A．increases C．will increase
．
B．increased D．has increased
创新设计高中英语课时精练：nit 22 Period 1北师大选修八,课标通
