A) errors B) shortcomings C) fault D) flaw

　　2. Vitamins are complex ________ that the body requires in very small mounts.

　　A) matters B) materials C) particles D) substances

　　3. The police are trying to find out the ________ of the woman killed in the traffic accident.

　　A) evidence B) recognition C) status D) identity

　　4. All human beings have a comfortable zone regulating the ________ they keep from someone they talk with.

　　A) distance B) scope C) range D) boundary

　　5. We have planned an exciting publicity ________ with our advertisers.

　　A) struggle B) campaign C) battle D) conflict

　　6. ________ the help of their group， we would not have succeeded in the investigation.

　　A) Besides B) Regardless of C) But for D) Despite

　　7. ________ much is known about what occurs during sleep， the precise function of sleep and its different stages remains largely in the realm of assumption.

　　A) Because B) For C) Since D) While

　　8. John doesn‘t believe in ________ medicine; he has some remedies of his own.

　　A) standard B) regular C) routine D) conventional

　　9. Owing to __ competition among the airlines， travel expenses have been reduced considerably.

　　A) fierce B) strained C) eager D) critical

　　10. In Africa， educational costs are very low for those who are __ enough to get into universities.

　　A) ambitious B) fortunate C) aggressive D) substantial

　　11. American football and baseball are becoming known to the British public through televised ________ from the United States.

　　A) transfer B) deliveries C) transportation D) transmissions

　　12. He will surely finished the job on time ________ he‘s left to do it in his own way.

　　A) in that B) so long as C) in case D) as far as

　　13. If this kind of fish becomes ________， future generations may never taste it at all.

　　A) minimum B) short C) seldom D) scarce

　　14. Agriculture was a step in human progress ________ which subsequently there was not anything comparable until our own machine age.

　　A) in B) for C) to D) from

　　15. The same factors push wages and prices up together， the one ________ the other.

　　A) emphasizing B) reinforcing C) multiplying D) increasing

　　16. Operations which left patients ________ and in need of long periods of recovery time now leave them feeling relaxed and comfortable.

　　A) exhausted B) abandoned C) injured D) deserted

　　17. ________ the temperature falling so rapidly， we couldn‘t go on with the experiment.

　　A) Since B) For C) As D) With

　　18. The bed has been ________ in the family. It was my great-grandmother‘s originally.

　　A) handed out B) handed over C) handed down D) handed round

　　19. According to the American federal government， residents of Hawaii have the longest life ________： 77.2 years.

　　A) scope B) rank C) span D) scale

　　20. Our hopes ________ and fell in the same instant.

　　A) aroused B) arose C) raised D) rose

　　答案：1-5 CDDAB 6-10 CDDAB

　　11-15 DBDCB 16-20 ADCCD