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1. Work in pairs and discuss the advantages and disadvantages of the following scientific discoveries and applications. (Page 23)
【考点】advantage用法
【归纳】 advantage作为名词常用于以下短语中： take advantage of =make use of 利用；have an advantage over 有比……的优势；to a person’s advantage 对人有利的。
【高考链接】
More and more people are singing up for Yoga classes nowadays, _______advantages of the health and relaxation benefits.(2005上海)
A. taking B. taken
C. having taken D. having been taken
2. In the eighteenth century, Benjamin Franklin conducted a number of experiments in which he showed what electricity is. (Page 24)
【考点】 短语a number of 以及experiment一词的用法
【归纳】 a number of意为“许多；若干；一些”，number前可用large / good / great /huge / small修饰of，后接复数名词，所构成的短语作主语时，谓语动词常用复数形式，因为该短语中的中心词是复数形式。the number of意为“……的数目”，后接复数名词，所构成的短语作主语时， 谓语动词常用单数形式，因为该短语中的中心词是number。experiment一词本身既可以用做名词“实验、试验”，与其搭配构成的短语常见的有do / make / conduct / carry out an experiment，也可以用做不及物动词“进行实验、进行试验”。另外注意：experimenter意为“实验者、试验者”，experimental意为“实验性的、试验性的”。
【高考链接】
1) In an experiment, 17 volunteers with no meditation experience in the experimental group spent three months meditating 10 to 12 hours a day. (2007天津)
2) As you can see, the number of cars on our roads_______ rising these days. (2006全国卷Ⅱ)
A. was keeping B. keep
C. keeps D. were keeping
3) Nowadays , a large number of women, especially those from the countryside,_______ in the clothing industry. (2005 辽宁)
A. is working B. works
C. work D. were worked
3. Having realized that I could use a kite to attract lightning, I decided to do an experiment. (Page 24)
【考点】 现在分词的完成式做状语。
【归纳】 现在分词的完成式做状语表示先于主句谓语动词发生的动作，相当于一时间状语从句。
【高考链接】
1) The storm left,_______ a lot of damage to this area. (2005 全国Ⅰ)
A. caused B. to have caused
C. to cause D. having caused
2) The manager,_______ it clear to us that he didn’t agree with us, left the meeting room. (2005 江西)
A. who has made B. having made
C. made D. making
4. This experiment proves that lightning and electricity are the same. (Page 24)
【考点】 prove 用法
【归纳】 vt. （1） 证明,证实（2）表现，显示 vi. 证明是；原来是，后面的to be可以省略。
【高考链接】
1) There are also those for whom hunting in fact offers a chance to prove themselves and risk death by design; ... (2007北京)
2) I took many measures to keep myself from being bitten, but they all proved useless. (2007四川)
5. Pick out the correct ones.(Page 25)
【考点】 pick的常用短语
【归纳】 pick out 意为“挑出；辨别出”；pick up 意为“ （偶然、不经意间）学到、获得信息”；“拾起、捡起”；“收听（看）”；“取（物）、接（人）”；“收拾、整理”；“好转、改善”； pick off 意为“ 摘下来”。
【高考链接】
1) It was so dark in the cinema that I could hardly_______ my friend.(2007四川)
A. turn out B. bring out
C. call out D. pick out
2) She_______ Japanese when she was in Japan. Now she can speak it freely. (2006福建)
A. picked out B. made out
C. made up D. picked up
3) This picture was taken a long time ago. I wonder if you can_______ my father.
(2005 湖北)
A. find out B. pick out
C. look out D. speak out
6. There is no doubt that 100 years ago animal testing was cruel but today animals in experiments are very well taken care of. (Page 27)
【考点】 doubt 用法
【归纳】 doubt n. (1) 怀疑（不可数）； (2) 疑虑（可数）。在否定句There is no doubt和I have no doubt后面如果接从句， 通常接以that引导的从句；在肯定句中，There is doubt 和I have doubt 后面如果接从句，通常接whether引导的从句。
vt.怀疑、不相信。其用法是（1）可接名词或代词作宾语；（2）在否定和疑问句中接以that引导的宾语从句，that可以省略；（3）在肯定句中一般接whether或if引导的宾语从句。
【高考链接】
① But with my mother’s words deeply rooted in my soul, I never doubted we would succeed. (2007 江苏)
② Some researchers believe that there is no doubt_______ a cure for AIDS will be found. (2005 广东)
A. which B. that C. whatD. whether
【考点】advantage用法
【归纳】 advantage作为名词常用于以下短语中： take advantage of =make use of 利用；have an advantage over 有比……的优势；to a person’s advantage 对人有利的。
【高考链接】
More and more people are singing up for Yoga classes nowadays, _______advantages of the health and relaxation benefits.(2005上海)
A. taking B. taken
C. having taken D. having been taken
2. In the eighteenth century, Benjamin Franklin conducted a number of experiments in which he showed what electricity is. (Page 24)
【考点】 短语a number of 以及experiment一词的用法
【归纳】 a number of意为“许多；若干；一些”，number前可用large / good / great /huge / small修饰of，后接复数名词，所构成的短语作主语时，谓语动词常用复数形式，因为该短语中的中心词是复数形式。the number of意为“……的数目”，后接复数名词，所构成的短语作主语时， 谓语动词常用单数形式，因为该短语中的中心词是number。experiment一词本身既可以用做名词“实验、试验”，与其搭配构成的短语常见的有do / make / conduct / carry out an experiment，也可以用做不及物动词“进行实验、进行试验”。另外注意：experimenter意为“实验者、试验者”，experimental意为“实验性的、试验性的”。
【高考链接】
1) In an experiment, 17 volunteers with no meditation experience in the experimental group spent three months meditating 10 to 12 hours a day. (2007天津)
2) As you can see, the number of cars on our roads_______ rising these days. (2006全国卷Ⅱ)
A. was keeping B. keep
C. keeps D. were keeping
3) Nowadays , a large number of women, especially those from the countryside,_______ in the clothing industry. (2005 辽宁)
A. is working B. works
C. work D. were worked
3. Having realized that I could use a kite to attract lightning, I decided to do an experiment. (Page 24)
【考点】 现在分词的完成式做状语。
【归纳】 现在分词的完成式做状语表示先于主句谓语动词发生的动作，相当于一时间状语从句。
【高考链接】
1) The storm left,_______ a lot of damage to this area. (2005 全国Ⅰ)
A. caused B. to have caused
C. to cause D. having caused
2) The manager,_______ it clear to us that he didn’t agree with us, left the meeting room. (2005 江西)
A. who has made B. having made
C. made D. making
4. This experiment proves that lightning and electricity are the same. (Page 24)
【考点】 prove 用法
【归纳】 vt. （1） 证明,证实（2）表现，显示 vi. 证明是；原来是，后面的to be可以省略。
【高考链接】
1) There are also those for whom hunting in fact offers a chance to prove themselves and risk death by design; ... (2007北京)
2) I took many measures to keep myself from being bitten, but they all proved useless. (2007四川)
5. Pick out the correct ones.(Page 25)
【考点】 pick的常用短语
【归纳】 pick out 意为“挑出；辨别出”；pick up 意为“ （偶然、不经意间）学到、获得信息”；“拾起、捡起”；“收听（看）”；“取（物）、接（人）”；“收拾、整理”；“好转、改善”； pick off 意为“ 摘下来”。
【高考链接】
1) It was so dark in the cinema that I could hardly_______ my friend.(2007四川)
A. turn out B. bring out
C. call out D. pick out
2) She_______ Japanese when she was in Japan. Now she can speak it freely. (2006福建)
A. picked out B. made out
C. made up D. picked up
3) This picture was taken a long time ago. I wonder if you can_______ my father.
(2005 湖北)
A. find out B. pick out
C. look out D. speak out
6. There is no doubt that 100 years ago animal testing was cruel but today animals in experiments are very well taken care of. (Page 27)
【考点】 doubt 用法
【归纳】 doubt n. (1) 怀疑（不可数）； (2) 疑虑（可数）。在否定句There is no doubt和I have no doubt后面如果接从句， 通常接以that引导的从句；在肯定句中，There is doubt 和I have doubt 后面如果接从句，通常接whether引导的从句。
vt.怀疑、不相信。其用法是（1）可接名词或代词作宾语；（2）在否定和疑问句中接以that引导的宾语从句，that可以省略；（3）在肯定句中一般接whether或if引导的宾语从句。
【高考链接】
① But with my mother’s words deeply rooted in my soul, I never doubted we would succeed. (2007 江苏)
② Some researchers believe that there is no doubt_______ a cure for AIDS will be found. (2005 广东)
A. which B. that C. whatD. whether