1. The basic causes are unknown ,although certain conditions that may lead to cancer have been A identified B guaranteed C notified D conveyed 2. The captain the horizon for approaching ships. A scanned B scrutinized C explored D swept 3. The little girl was by the death of her dog since her affection for the pet had been real and deep. A grieved B suppressed C oppressed D sustained 来源：www.examda.com 4. They are well with each other since they once studied in the same university. A identified B recognized C acknowledged D acquainted 5. When he tried to make a , he found that the hotel was completely filled because of a convention. A reservation B claim C mess D revision 6. Parents take a great interest in the questions raised by their children. A nasty B naï.ve C obscure D offensive 7. The government has devoted a larger slice of its national agriculture than most other countries. A resources B potential C budget D economy 8. The fire has caused great losses ,but the factory tried to the consequences by saying that the damage was not as serious as reported. A decrease B subtract C minimize D degrade 9. While nuclear weapons present grave dangers, the predominant crisis of overpopulation is with us today. A inevitable B constant C overwhelming D potential 10. Fiber-optical cables can carry hundreds of telephone conversations. A simultaneously B spontaneously C homogeneously D contemporarily 11. In today’s medical field ,little agreement exists on the for defining mental illness. A legislation B requirement C criteria D measures 12. Parents often faced the between doing what they felt was good for the development of the child and what they could stand by way of undisciplined noise and destructiveness. A junction B paradox C premise D dilemma 13.Bruce Stephen gripped the wheel hard as the car bounced up and down. 来源：www.examda.com A stirring B driving C steering D revolving 14. Rumors are everywhere ,spreading fear, damaging reputations , and turning calm situations into . A turbulent B tragic C vulnerable D suspicious 15. The younger person’s attraction to stereos cannot be explained only familiarity with technology. A in quest of B by means of C in terms of D by virtue of 16.They were in their scientific research, not knowing what happened just outside their lab. A submerged B drowned C immersed D dipped 17. His was telling him that something was wrong. A sentiment B inspiration C hypothesis D intuition 18. The court considers financial to be appropriate way of punishing him. A option B duty C obligation D penalty 19. The ties that bind us together in common activity are so that they can disappear at any moment. A trivial B fatal C tentative D feeble 20. Frankly speaking ,your article is very good except for some mistakes in grammar. A obscure B glaring C trivial D rare 21.The old gentleman was a very looking person, with grey hair and gold spectacle. A respective B respectable C respectful D respected 22.Astronauts are all kinds of tests before they are actually sent up in an spacecraft. A bound to B prone to C subjected to D inclined to 23.For many patients ,institutional care is the most and beneficial form of care. A persistent B appropriate C thoughtful D sufficient 24. He wouldn’t answer the reporters’ questions ,nor would he for a photograph.来源：www.examda.com A summon B highlight C pose D marshal 25. Mr. Smith became very when it was suggested that he had made a mistake. A ingenious B empirical C objective D indignant 26. Among all the changes resulting from the entry of women into the work force the transformation that has occurred in the women themselves is not the least important. A massive B quantitative C surplus D formidable来源：www.examda.com 27.It is hard to tell whether we are going to have a boom in the economy or a . A concession B recession C submission D transmission 28. We’ll be very careful and keep what you’ve told us strictly . A rigorous B confidential C private D mysterious 29. If we our relations with that country ,we’ll have to find another supplier of raw materials. A diffuse B diminish C terminate D preclude 30 The detective and his assistant have begun to the mysterious murder.来源：www.examda.com A look into B see to C make over D come through 1------10 AAADA BCCDA 11-----20 CDCAC CDDDC 21-----30 BCBCD ABBCA