英语四级练习题

1.W hat the dog was the first animal to be domesticated is generally agreed upon by authorities in the field.2.T hough costly, a shirt made of synthetic material lasts longer than which is made of silk.

3.A ccusing of neglecting the child’s education, the worker sent his eleven-year-old son to an evening school.4.M illions of dollars in the national bank is said to be stolen during the blackout last night.

5.E ven the calculation is right, scientists can never be sure that they have included all variables and modeled themaccurately.

6.A ll flights have been canceled because of

the snowstorm, many passengers could do nothing but take the train.

7.R esearch findings show we spend about two hours dreaming every night, no matter what we must have done during theday.

8.A severe weather alert is now in effect for the whole eastern China and Japan.

9.O nce is given a carefully worked—out program, a computer can gather a wide range of information for many purposes.10.So crowded Roman is in the summer that travelers find it difficult to have a comfortable place to live in11.Janet is finally used to cook on an electric stove after having a gas one for so long.12.Reading several books on that subject, Bill considered himself an expert.

13.We were pleased to have the opportunity to watch such good dancers to perform a highly praised new ballet.14.Even though the child pretended sleeping, when we opened the bedroom door we were not fooled.Having finished his term paper before the fixed date, it was delivered to the professor before the class.英语四级改错练习题（1）

Only a generation ago, Mauritania's capital city was

many day's walk from the Sahara. Today it is in the Sahara. 1.__________ The sand blows through the city streets and pilesup in 2.__________ walls and fences. The desert stretches out as far as theeye can see.

In some parts of the Amazon rain forest in brazil, all

the trees have cut down. The earth lies bare and dry in the 3.__________ hot sun. Nothing grow there anymore.4.__________

Over vast areas of every continent, the rainfall and

vegetation necessary for life is disappearing. Already 5.__________

more than 40 percent of the earth's land is desert and 6.__________ desert-like. About 628 million people--one out of seven--live in these dry regions. In the past, they have managed to

survive, but in difficulty. Now, largely through problems 7.__________ caused by modern life, our existence is threatened bythe 8.__________ slow, steady spread of the earth's deserts.Many countries first became concerned in 1970s after 9.__________a terrible drought and famine destroyed Africa's Sahel,the fragile desert along the south edge of the Sahara.

Thousands of people died even though there was a worldwideeffort to send food and medicine to the starved people. 10.__________参考答案1. day's →days'2. in →against3. have ∧cut →been4. grow →grows5. is →are6. and →or7. in →with8. our →their9. in ∧1970s →the10. starved →starving英语四级改错练习题（2）

There are great many reasons for studying what philosophers 1.________ have said in the past. One is that we cannotseparate the

history of philosophy from which of science. Philosophy is 2.________

large discussion about matters on which few people are quite 3.________ certain, and those few hold opposite opinions. Asknowledge

increases, philosophy buds off the sciences.

For an example, in the ancient world and the Middle Ages 4.________ philosophers discussed motion. Aristotle and St.Thomas

Aquinas taught that a moving body would slow down until a force 5.________ were constantly applied to it. They werewrong. It goes on moving

unless something slows it down. But they had good arguments ontheir side, and if we study these, and the experiments

which proved them right this will help us to distinguish truth 6.________from false in the scientific controversies of today. 7.________We also see how different philosopher reflects the social 8.________life of his day. Plato and Aristotle, in the slave-owning societyof ancient Greece, thought man’s highest state was contemplationrather than activity. In the Middle Ages St. Thomas

believed a regular feudal system of nine ranks of angels. Herbert 9.________ Spencer, in the time of free competitionbetween capitalists,

found the key to progress as the survival of the fittest. Thus 10.________ Marxism is seen to fit into its place as thephilosophy for

the workers, the only class with a future.参考答案

1. are ∧great →a2. which →that3. large →largely4. an →/5. until →unless6. right →wrong7. false →falsehood8. different →every9. believed ∧a →in10. as →in

英语四级改错练习题（3）

Word came from California of a new weapon in the war on household pests．Two scientists work for a firm in Californiadeveloped 1．__________

a new method to eliminate insects with using dangerous chemicals．The new 2．__________

weapon—hot air．The basic idea is that insect pests can adjust to temperature much above 3．__________

normal．In laboratory experiments，cockroaches and termites can't survive much more than a quarter of hour at 100

degrees 4．__________ Fahrenheit or about fifty degrees centigrade．The new method involves covering a house with ahuge tent，and fill it with air heated to 5．__________

around 65 degrees centigrade．Hot air is forced in with fans and the tent keeps the heat inside the house．Although termitestry to escape by 6．__________ hiding in wood beams，the heat treatment must be continued by four to six hours．Butwhen it's 7．__________

all over and the insects are dead，there are no toxic residues to danger humans or pets，and no 8．__________funny smells．Scientists claim that there's no danger of firetoo．9．__________

Since very few household materials will burn at 65 degrees centigrade．In fact，wood is prepared for construction use bydrying in the ovens at 100 degrees centigrade，that is substantially hotter．10．__________参考答案

1．Work →working2．with→without

3．can adjust→can not adjust4．hour→an hour5．fill→filling6．Although→Since7．by→for

8．danger→endanger9．too→either10．that→which

英语四级改错训练试题4+答案

英语四级改错练习题（4）

When some nineteenth century New Yorkers said \"Harlemhey meant almost all of Manhattan above Eighty-sixth Street.Toward the end of the century, however, a group

of citizens in upper Manhattan-want perhaps, to shape a closer 1._________ and more precise sense of community—designated a section that

they wished to have known as Harlem. The chosen area was theHarlem which Blacks were moving in the first decades of the 2.________new century as they left their old settlements on the middle andlower blocks of the West Side.

As the community became predominantly Black, the very

word \"Harlem\" seemed to lose its old meaning. At time it was 3.________ easy to forget that \"Harlem\" was originally theDutch name

\"Harlem\"; the community it described had been founded by 4.________ people from Holland；and that for most of its threecenturies—it

was first settled in the sixteen hundreds—it had been preoccupied 5.________ by White New Yorkers. \"Harlem\" becamesynonymous to 6.________

Black life and Black style in Manhattan. Blacks living there

used the word as though they had coined it on themselves—not 7.________ only to designate their area of residence but toexpress their

sense of the various qualities of its life and atmosphere. As the

years passed, \"Harlem\" asserted an even larger meaning. In 8.________the words of Adam Clayton Powell, Sr., the pastor of the

Abyssinian Baptist Church, Harlem \"became the symbol of libertyand the Promised Land to Negroes everywhere\".

By 1919 Harlem's population had grown by several thousand.It had received its share of wartime migration from the South,the Caribbean, and parts of colonial Africa. Some of the

new arrivals merely lived for Harlem; it was New York they had 9.________ come to, looking for jobs and for all the otherlegendary opportunities

of life in the city. To others who migrated to Harlem, New York was merely the city in which they found themselves: Harlemwas exactly what they wished to be. 10.________参考答案1. want→wanting2. Harlem ∧which →to3. time →times

4. Harlem; ∧the community →that5. preoccupied →occupied

6．to →with7. on →／

8. asserted →assumed9. for →in10. what →where

英语四级改错练习题（5）

Expressing Yourself in English is an inter- esting new textbook with some variations from the traditional in itsapproach．They would 1．__________

seem appropriate for self-study，especially when used in conjunction with the cassette，but is primarily intended ofclassroom use．Indeed，2．__________

the text itself contains notes to the teachers rather than that appearing in a separate teacher’s guide．3．__________Each unit contains three readings，all of which，except for those appearing in the ninth and the final unit，areillustrated．The teacher's notes indicate the teacher should refrain of 4．__________

answering students' questions about these readings until each student has worked through all the reading comprehensionexercises without help．Among the book's distinctive features is the fact that contains a more extensive list of5．__________

references than any other writing for this level，6．__________

which exercises are provided and allow students to be creative with the English they learn．Again，like most comparabletexts，Expressing7．__________

Yourself in English does not formally introduce the verb until Unit 3．One hint for teachers and students likely is that students8．__________

should not expect to be successful with the examinations offered in the body of the text if 9．__________

they study outside of class and memorize the dialogue that introduces each unit．In order to keep the price lowly，the book10．__________

is paperbound and all pictures and illustrations are in black and white．The textbook will be accompanied by a workbook tobe published later this year．参考答案1．They→It2．of→for3．that→those4．of→from

5．contains→在contains前加it 6．writing→written7．like→unlike8．likely→alike9．if→unless10．lowly→low