NOTallmemoriesaresweet.Somepeoplespendalltheirlivestryingtoforgetbadexperiences.

Violenceandtrafficaccidentscanleavepeoplewithterriblephysicalandemotionalscars.Oftenthey

relivetheseexperiencesinnightmares.

NowAmericanresearchersthinktheyareclosetodevelopingapill，whichwillhelppeopleforgetbadmemories.Thepillisdesignedtobetakenimmediatelyafterafrighteningexperience.Theyhopeitmight

reduce，orpossiblyerase（抹去），theeffectofpainfulmemories.

InNovember，expertstestedadrugonpeopleintheUSandFrance.Thedrugstopsthebody

releasingchemicalsthatfixmemoriesinthebrain.Sofartheresearchhassuggestedthatonlytheemotionaleffectsofmemoriesmaybereduced，notthatthememoriesareerased.

Theresearchhascausedagreatdealofargument.Somethinkitisabadidea，whileotherssupportit.

Supporterssayitcouldleadtopillsthatpreventortreatsoldiers'troublingmemoriesafterwar.They

saythattherearemanypeoplewhosufferfromterriblememories.

"Somememoriescanruinpeople'slives.Theycomebacktoyouwhenyoudon'twanttohavetheminadaydreamornightmare.Theyusuallycomewithverypainfulemotions，"saidRogerPitman，aprofessor

ofpsychiatryatHarvardMedicalSchool."Thiscouldrelievealotofthatsuffering."

Butthosewhoareagainsttheresearchsaythatchangingmemoriesisverydangerousbecause

memoriesgiveusouridentity（特质）.Theyalsohelpusallavoidthemistakesofthepast.

"Allofuscanthinkofbadeventsinourlivesthatwerehorribleatthetimebutmakeuswhoweare，I'mnotsurewewanttowipethosememoriesout，"saidRebeccaDresser，amedicalethicist.

1.Thepassageismainlyabout（）（）（）.

A.anewmedicalinvention

B.anewresearchonthepill

C.awayoferasingpainfulmemories

D.anargumentabouttheresearchonthepill

2.Thedrugtestedonpeoplecan（）（）（）.

A.causethebraintofixmemories

B.stoppeoplerememberingbadexperiences

C.preventbodyproducingcertainchemicals

D.erasetheemotionaleffectsofmemories

3.Wecaninferfromthepassagethat（）（）（）.

A.peopledoubttheeffectsofthepills

B.thepillwillstoppeople'sbadexperiences

C.takingthepillwilldoharmtopeople'shealth

D.thepillhasprobablybeenproducedinAmerica

4.WhichofthefollowingdoesRebeccaDresseragreewith?

A.Somememoriescanruinpeople'slives

B.Peoplewanttogetridofbadmemories

C.Experiencingbadeventsmakesusdifferentfromothers

D.Thepillwillreducepeople'ssufferingsfrombadmemories

正确答案：1-4:DCAC