本期重點： 平行結構
平行結構錯誤主要指在并列連接詞and前后語法結構不對等、不平行。其它并列連詞還有but, as well as, or, or else, both … and, neither … nor, either … or, not only … but (also)等可連接兩個對等的詞和對等的結構。
考點例析
1：Computeranalyzed marketing reports can help deciding
which products to emphasize now,which to develop for
the future, and which to be dropped. ____________
解析：本句中三個平行成份which products to emphasize now, which to develop和which to be dropped結構模式應該一致，均采用不定式主動語態，因而to be dropped應改為to drop。(注：在四六級考試中，短文改錯只能修改、刪除或添加一個單詞，不能同時改動兩個。本例題旨在反映平行結構的語法性質。)
例2：At the heart of the NEA survey is the belief that our
democratic System depends on leaders who can think
critically, analyze texts and writing clearly. ___________
解析：can后面有三個并列的謂語動詞，因此writing應改成與think, analyze并列的動詞原形write。
例3：Atrophy is a decrease in size of a cell, organ, tissues, or other part of the body. _______
解析;：并列連詞or連接四項名詞結構，其中cell 和organ皆為單數形式，故tissues應改為單數tissue。
鞏固與拓展
1.A majority of the reports received from people claiming
to have seen the lengendaiy Loch Ness monster have
proven to be mistakes, misconceptions, or tricked. ___________
2. Your semester grade is based not only on how well you
do on each test, but also how you participate in class. ___________
3. Modern sience was born when Galileo began trying to explain
how things happen and thus originating the method of controlled __________
experiment which now forms the basis of scientific investigation
4. Restrict your self to one or two pages, and listing ___________
any publications or referees on a separate sheet.
5. The House proposal would have barred the federal
government from demanding library records, read lists, __________
book customer lists and other material in terrorism and
intelligence investigations.
綜合改錯
The biggest safety threat facing airlines today may not be a terrorist
With a gun, than the man with the portable computer in business class. 1._____
In the last 15 years, pilots report well over 100 incidents tha could 2. _____
have been caused by electromagnetic interference. The source of this
interference remains confirmed, but increasingly, experts are pointing the 3._____
blame at portable electronic devices such as portable computers, radio and 4. _____
cassette players and mobile telephones.
RTCA, an organization advertises the aviation industry, has 5. ______
recommended that the airline bans such devices from 6.______
used during “critical” stages of lignt, particularly take-off and landing. 7._______
Some experts have gone further, calling for a total ban during all flights.
Currently, rules on using these devices are left up to individual airlines.
And although some airlines prohibit passengers from using such equipment
during take-off and landing, most are willing to enforce a total ban, given 8. ______
that many pasengers want to work during flights.
The difficulty is predicting how electromagnetic fields may affect an
aircraft’s computers. Experts know that portable devices emit radiation
which affect those wavelength which craft use for navigation and 9.______
communication. But , because they have not been able to reproduce
these effects in a laboratory, they have no way of knowing
whether the interference might be danger or not. 10.______
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