本期重点：句子结构不完整
比较复杂的复合句最容易出现此类错误，因为句子较长，缺少了某个成分，如主语、谓语、宾语、连词等等。
考点例析：
例1： If his aim is inaccurate and he scores a goal, enjoys S3.____
the hunter’s triumph of killing his prey.
解析：这是由一个条件状语从句引导的复合句。但主句只有谓语动词enjoys，缺少主语，因此要步上主语。根据从句的his aim可推断应该加上主语he。
例2：Nuclear physicists who interested in the structure of 5._________
atoms cannot observe protons, electrons and neutrons
directly.
解析：如果将who后面的部分作定语从句，那么它绝少谓语，故将who去掉，此时分词短语interested in直接作定语修饰前面的physicists。或在who后加are，补全定语从句。
例3：This alliance guarantees that all leprosy patients, even they S6.______
are poor, have a right to the most modern treatment.
解析：even是副词，后面不能直接跟句子，根据句子的意思，应该在even后加if或though。
巩固与拓展
1. A student of music needs as long and as arduous a training
to become a performer a medical student needs to become __________
a doctor.
2. This trip can be found in a booklet, Passport to the Pub:
The Tourists’ Guide to Pub Etiquette, a customers’ code of
conduct for those want to sample "a central part of British ________
life and culture.
3. When a new robot is introduced to a small suburban
factory, a Shinto priest is invited to inaugurate. _________
4. Since the law made easier to get a divorce, the number of __________
divorces has increased.
5. Another changehas been caused by the fact people are _______
living longer nowadays, and many old people live alone
following the death of their partners
综合训练
Many peolpe than ever are drinking coffee these days -- but in small 1.____
quantities than they used to. Some manufacturers of coffee makers are
trying to make advantage of this trend by developing diminutive machines 2.___
that brew（煮）smaller amounts of coffee. Two U.S appliance companies
---Black&Decker, basing in Twson, Maryland, and Toastmaster Inc. 3.___
of Columbia, Missouri ---has recently introduce "drip" Coffee makers that 4.____
brew one or two cup servings of coffee. Neither of the products brew the 5._____
coffee directly into a cup or mug, eliminating the need for a separate
carafe. Since many people make a pot of coffee in the morning and drink 6.____
only a single cup, the new cofee makers should reduce the wasted coffee.
Black&Decker’s Cup-at-a-Time spends $27, while Toastmaster’s Coffee 7.___
Break retails for $20.
Black&Decker also makes a coffee maker drips coffee directly into a 8.____
carry-around thermal carafe. The carafe, a glass vacuum bottle, is supposed
to keep the coffee fresh for hours. The product, called the Thermal Carafe
coffee-maker, comes with a built-in lid that opens during the brewing
process, closes when it is completed. There are several models, including 9.____
one that firs under the counter, ranging from $60 to $110 at price. 10._____
来源：无忧考网-四六级 http://www.51test.net/cet
