高一英语Unit 16考点透视与点拨
1. In the eighteenth century，Benjamin Franklin conducted a number of experiments in which he showed what electricity is. （Reading）
考点：a number of意为“许多”，相当于many，修饰复数名词。a number of+复数名词用作主语时，谓语动词用复数形式；the number of意为“……的数目”，用作主语时，谓语动词用单数形式。
考例： The number of people invited _______ fifty， but a number of them _______ absent for different reasons. （NMET 1996）
A. were； was B. was； was
C. was； were D. were； were
点拨： 选C.句意为 “受邀人数是50人，而他们中有许多人由于各种原因没有来”。
2. Having realised that I could use a kite to attract lightning，I decided to do an experiment.（Reading）
考点：having done是动词-ing形式的完成式， 在句中作状语， 它表示的动作先于句子谓语动词已经持续了若干时间或若干次。其否定形式是not having done，即在 having前直接加not.
考例1： ______ in the queue for half an hour，Tom suddenly realized he had left his wallet at home.（北京2004）
A. To wait B. Have waited
C. Having waited D. To have waited
考例2：The old man， ______ abroad for twenty years，is on the way back to his motherland.（江苏2004）
A. to work B. working
C. to have worked D. having worked
考例3： ______ the programme，they have to stay there for another two weeks. （广东2004）
A. Not completing
B. Not completed
C. Not having completed
D. Having not completed
点拨：考例1选C.考例2选D.考例3选C.
3. I brought my finger close to the key and felt a light but very clear electric shock. （Reading）
考点：close此处为副词， 意为“靠近”，通常与to连用。
考例：It was raining heavily. Little Mary felt cold，so she stood _______ to her mother.（北京2002）
A. close B. closely C. closed D. closing
点拨：选A.closely意为“紧密地， 紧紧地； 认真地， 密切地”， 通常不与to连用；closed意为“关闭的”。
4. This ribbon，which must not get wet，will protect you from the electricity. （Reading）
The key tied to the string was put into the door to stop the kite from flying away. （Post-reading）
考点：protect……from意为“保护……；使……不受伤害”；stop/prevent……from doing 意为“阻止”。
考例：People first began to wear hats to _______ themselves from the climate. （上海2004春 完形填空第55题）
A. defend B. protect C. prevent D. hide
点拨： 选 B.defend意为“保卫，捍卫”；prevent意为“防止，预防，阻止”；hide意为“隐藏，隐瞒”，均不符合句意。
5. There is a very high chance that it also works with people.
There is no doubt that 100 years ago animal testing was cruel but today animals in experiments are very well taken care of.（Integrating Skills）
考点：There is no doubt/possibility /chance等常常引出同位语从句，进一步说明doubt，possibility，chance等中心词的具体内容。
考例：_______ is no possibility ______ Bob can win the first prize in the match. （上海2001春）
A. There； that B. It； that
C. There； whether D. It； whether
点拨：选A.There is no possibility that……意为“没有……的可能性”。其中that引导的从句充当possibility的同位语。
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