2014考研英語：完形填空高分強化訓練(二)_跨考網(wǎng)

　　2014考研英語：完形填空高分強化訓練(二)

　　練習

　　I.Cloze

　　A single night of taking the drug Ecstasy can cause serious brain damage and hasten the ___1___ of Parkinson's disease, scientists say. Just two to three Ecstasy tablets-a quantity that thousands of clubbers take during raves-can permanently __2____ brain cells that affect movement and ___3___, according to American research that -___4___ the drug to Parkinson's for the first time.

　　A study by a team at Johns Hopkins University in Baltimore, Maryland, ___5___ monkeys and baboons found that both species of primate __6____ irreversible damage to key cells __7___ dopamine neurons, which are lost in Parkinson's, after receiving three low doses of Ecstasy at three-hour ___8___.

　　The study is particularly significant because baboons are one of the best animal models for the human ___9___. George Ricaurte, who led the research, said that widespread ___10___ of the drug may already be ___11___ victims of such neurological damage. "The most troubling ____12__ is that young adults using Ecstasy may be ___13___ their risk for developing Parkinsonism as they get older."

　　Alan Leshner, a former director of the US National Institute on Drug Abuse, said: "This study emphasizes the multi-faceted damage that Ecstasy can do ___14___ users. We've long known that repeated use damages serotonin brain cells. This study shows that even very __15____ use can have long-lasting effects __16___ many different brain systems. It sends an important message to young people: don't ___17___with your own brain."

　　Janet Betts, the Essex mother whose daughter Leah died after a single Ecstasy tablet in 1995, said: "This comes as no ___18___. People can't see the effects at first, and they're in permanent denial, saying it's not going to happen to them. But we'll see the ___19___ later, just as we have __20____ smoking.

　　1. [A]outset [B] onset [C]outcome [D]opening

　　2. [A] destroy [B]demolish [C]ruin [D]wreck

　　3. [A]intuition [B]understanding [C] reasoning [D]judgment

　　4. [A]connect [B] links [C]combine [D]unite

　　5. [A] involving [B]taken [C]involved [D]engrossing

　　6. [A]made [B]did [C] suffered [D]escaped

　　7. [A]marked [B]titled [C]naming [D] called

　　8. [A]time [B]process [C]intermission [D] intervals

　　9. [A]body [B]heart [C] brain [D]head

　　10. [A]disuse [B]ill-use [C]misuse [D] abuse

　　11. [A]requiring [B] claiming [C]doing [D]enduring

　　12. [A]suggestion [B] implication [C]insinuation [D]intimation

　　13. [A]enlarging [B]extending [C] increasing [D]expanding

　　14. [A] to [B]with [C]as [D]for

　　15. [A]irregular [B]sparse [C] occasional [D]insufficient

　　16. [A]to [B] on [C]with [D]in

　　17. [A]do [B]make [C]use [D] experiment

　　18. [A]amazement [B]astoundment [C]astonishment [D] surprise

　　19. [A] symptoms [B]signs [C]tokens [D]marks

　　20. [A]to [B] with [C]as [D]in