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人教版高中英语选修六《Unit 4 Global warming》专项训练 （4份打包）
专项提升：Unit4__语法拔高练习.doc
阅读训练：Global__Warming.doc
专项练习：Unit4__写作专题训练.doc
专项练习：Unit4__语法练习.doc
　　阅读训练: Global Warming
　　Section A
　　本文词数:302 参考时间:2'40''
　　Rising temperatures in coming years would lead to less sea ice in the Southern Ocean that surrounds Antarctica and fewer habitats and feeding grounds for penguins, says the World Wildlife Fund (世界自然基金会) in its report 2 Degrees is Too Much.
　　Antarctica and the Arctic are the most threatened regions from climate change. In the Antarctica, the temperature has risen 2.5 degrees in the past 50 years. This speed is nearly five times faster than that before the Industrial Revolution. It is mainly caused by burning fossil fuels. Unless nations reduce carbon dioxide emission1, the world will warm by an average of 2 degrees in less than 40 years. Rich nations should agree to reduce greenhouse gas emission. Temperatures near the Poles have risen much faster, which has led glaciers2 on the Antarctic Peninsula to melt3 quickly.
　　The situation is quite critical, because in the past 50 years the number of emperor penguins (帝企鹅) has decreased by 50 percent across the whole Antarctica. On the Antarctic Peninsula’s northwest coast, the number of Adelie penguins (阿德里企鹅) has dropped surprisingly over the past 25 years.
　　Fifty percent of the habitats of the emperor penguin and 75 percent of the habitats of the Adelie penguin face a rapid reduction, or even disappearance, if the global temperature rises 2 degrees above pre-industrial levels.
　　With a 2-degree increase in global temperature and the decrease in sea ice thickness, emperor penguins will find it difficult to find new areas to live. With less sea ice, penguins could be pushed further south, but this could prevent them from hunting for food during the dark winters, because they need at least a few hours of daylight to find their food.
　　Notes:
　　1. emission n. 排放
　　2. glacier n. 冰川
　　3. melt v. 融化
　　词数:150处理时间:2′45″
　　Read the passage and then choose the best answer for each question.
　　1. The purpose of the passage is to _____.
　　专项练习：Unit4 写作专题训练
　　请根据下列内容写一篇100词左右的海报。
　　全球变暖问题越来越引起人们的关注，它所产生的严重后果也逐渐为人所知。为此，你校学生会特意 邀请了环保专家来校举办讲座，专门就全球变暖问题产生的原因、后果，以及中学生如何应对全球变暖问题等将进行论述，并在演讲结束后回答  同学们的提问。
　　时间：星期五8：00 a．m～11： 00 a．m.
　　地点：大厅
　　专项练习：Unit4语法练习
　　Ⅰ.句型转换
　　(一)对下列各句中的加黑部分进行强调
　　1．Susan and John were absent from school yesterday.
　　2．He wasn’t able to go back to his motherland until the war was over.
　　3．The old lady was looking for a Chinese dictionary.
　　4．When did you receive the gift?
　　5．Did the professor graduate from Shandong University in 1968?
　　Ⅱ.单项填空
　　1．Because of the heavy traffic, it was already time for lunch   break________  she got to her  office.
　　A．since B．that C．when D．until
　　2．The man didn’t know ________ the thief broke into the house    and stole all his valuable things.
　　A．it was when that B．when it was that
　　C．that it was when D．was it when that
　　3．The military tension in the north-eastern Asian area over the past month has been the worst in more than a decade.  Was ________ the US-South Korean Joint Military Exercises ________ made situations worse and worse?
　　A．there; that  B．that; which C．it; that  D．what; which
　　4．It was________ he said ________ disappointed me.
　　A．that; what B．what; that
　　C．what; what D．that; that
　　5.________ find my wallet, Tom?
　　A．Where did you that          B．Where was it you
　　C．Where have you             D．Where was it that you
　　6．It was not until midnight ________ they reached the camp site.
　　A．that  B. when C．while D．as
　　7．Could it be in the room ________ we had a talk last night ________    you left  your key?
　　A．that; where B．where; when
　　C．where; that D．where; where
　　8. ________ I re-read his poems recently ________ I began to like them.
　　A．It was only when;  that      B．It was only then; that
　　C．It was that; when           D．It was when; then