练习4：

1. Many fine cooks insist on ingredients of the highest quality.
A) demand
B) rely on
C) prepare for
D) create

2. Since the Great Depression, the United States government has protected farmers from damaging drops in grain prices.
A) slight
B) surprising
C) sudden
D) harmful

3. Cement was seldom used in building during the Middle Ages.
A) crudely
B) rarely
C) originally
D) symbolically

4. Nerve signals may travel through nerve or muscle fibers at speeds as high as two hundred miles per hour.
A) velocities
 
B) impulses
C) ratios
D) atrocities

5. The poet William Carols Williams was a New Jersey physician.
A) doctor
B) professor
C) physicist
D) resident

6. Medicine depends on other fields for basic information, particularly some of their specialized branches.
A) conventionally
B) obviously
C) especially
D) inevitably

7. We shall take the treasure away to a safe place.
A) clean
B) pretty
C) distant
D) secure

8. An important part of the national government is the Foreign Service, a branch of their specialized branches.
A) a unity
B) a division
C) an embassy
D) an invasion

9. The child s abnormal behavior puzzled the doctor.
A) bad
B) frightening
C) repeated
D) unusual

10.There is an abundant supply of cheap labor in this country.
A) a steady
B) a plentiful
C) an extra
D) a meager

11.In order to improve our standard of living, we have to accelerate production.
A) step up
B) decrease
C) stop
D) control

12.Gas does accumulate in the mines around here.
A) increase
B) spread
C) collect
D) grow

13. Our plan is to allocate one member of staff to handle appointments.
A) assign
B) persuaded
C) ask
D) order

14. Her behavior is extremely childish.
A) simple
B) immature
C) beautiful
D) foolish

15. We also want to use the water to irrigate barren desert land.
A) hairless
B) bare
C) empty
D) bald

Key :ADBAA CDBDB ACABB
练习5：

1. All living organisms, regardless of their unique identity, have certain biological, chemical, and physical characteristics in common.
　A) as a result of B) considering C) on purpose D) whatever

2. The most pressing problem any economic system faces is how to use its scarce resources.
　A) puzzling B) difficult C)terrifying D) urgent

3. The Klondike was the scene of one of the biggest gold rushes the world has ever known.
　A） location B)view C) event D) landscape

 
4. Of the reptile groups, the snake group was the final one to appear.
　A) last B)best C) ugliest D)longest

5. Colleges and universities usually give diplomas or certificates to students who complete course requirements satisfactorily.
　A) responsibly B) acceptably C) patiently D)respectfully

6. A will is a document written to ensure that the wishes of the deceased are realized
　A) fulfilled B) affiliated C) advocated D) received

7. She has been the subject of massive media coverage.
　A) extensive B) negative C) responsive D) explosive

8. The conference explored the possibility pf closer trade links.
　A) rejected B) investigated C) proposed D) postponed

9. Experts generally agree that diet has an important bearing on one s health.
　A) result B) factor C) cause D) influence

10. I expect that she will be able to cater for your particular needs.
　A) meet B) reach C)provide D) fill

11. John is collaborating with Mary in writing a book.
　A) cooperating B) merging C) combining D) associating

12. Mary lost control of her car and collided with a tree.
　A) came across B) ran into C) met D) knocked

13. Mary was compelled to take in washing to help support her family.
　A) pleaded B) appealed C) forced D)instructed

14. The child couldn t comprehend the advanced textbook.
　A) interpret B) read C) understand D) translate

15. I warned him to keep the matter confidential.
　A) private B) safe C) personal D) secret

Keys: DDAAB AABDA ABCCD

练习6：

1.The old concerns lose importance and some of them vanish altogether.
A. develop B. disappear
C . linger D. renew

2. In the United States educational system, intermediate school is the transitional phase between the primary grades and high school.
A. stage B. notion
C . pattern D. alternative

3.Fluoride deters tooth decay by reducing the growth of bacteria that destroy tooth enamel.
A. facilitates B. overwhelms
C . inhibits D. loosens

4. The firm of Bonnin and Morris in Philadelphia was probably the first American company to manufacture porcelain.
A. silverware B. crystal
C .china D. linen

5.Gunpowder was used extensively in firearms prior to 1890.
A. in B. around
C . from D. before

6.We packed up the things I had accumulated over the last years and left for good.
A. close B. near
C . past D. final

7.The chemical is lethal to rats but safe to cattle.
A. toxic B. harmful
C . deadly D. contagious

8.She is very conscientious about her work.
A. worried B. careful
C . anxious D. nervous

9. She has consolidated her power.
A. strengthened B. won
C . hardened D. united

10.The drinking water is contaminated with impurities.
A. blackened B. polluted
C . darkened D. mixed

11.Her novel depicts a futuristic America.
A. writes B. sketches
C . describes D. indicates

12. He expressed concern that the ship might be in distress.
A. despair B. difficulties
C. need D. danger

13.They are endeavoring to change society as a whole.
A. trying B. working
C . doing D. making

14.Your eternal boasting annoys everyone.
A. unchangeable B. everlasting
C . boring D. monotonous

15. The other women seemed contented and they even exhibited their bellies with pride.
A. demonstrated B. uncovered
C . spread D. showed

Key: BACCD CCBAB CDABD