Despite their lack of success so far, research scientists have ______ in their research for a cure for AIDS.

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问题 Despite their lack of success so far, research scientists have ______ in their research for a cure for AIDS.

选项 A、maintained
B、retained
C、insisted
D、persevered

答案D

解析动词词义与搭配题。四个选项都有“坚持”或“保持”之义，句首的Despite引导让步状语从句，可知其后的主句应表“科学家们坚持研究”，且该词还必须能与in搭配，故D正确。maintain是及物动词，表示“维持，继续”；retain也是及物动词，表示“保持，保留”；insist表示“坚持，强调”，与on搭配使用。

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专业英语四级

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Despite their lack of success so far, research scientists have ______ in their research for a cure for AIDS.

专业英语四级

AtfirstJimwasnotquiteclearwhathewasgoingtodoafteruniversity,butnowheseems______onbecomingacomputerprogramm

Unfortunatelythereportwasprepared______andcontainedseveralinaccuracies.WhichofthefollowingphraseisNOTcorrecttoc

Ididtheworktothebestofmy______inordertoliveuptomyparents’expectations.

Whatdothestudentsdoaftertheintroductionofbasicfilmterminology?

SalvorBattleBetweenAdobeandAppleforFlashMobilecommunicationsdevicescouldbetheTESTinggroundforthenextgenera

Whoapprovedtheproposaltolegalizegaymarriage?

DoctorsevaluatethefollowingaboutkidsEXCEPT

Upuntilthattime,hisinteresthadfocusedalmost______onfullymasteringtheskillsandtechniquesofhiscraft.

Onlyyearslater______thetruthaboutthematter.

Didyoueverhavesomeone’snameonthetipofyourtongueandyetyouwereunabletorecallit?(1)_____thishappensagain,do

印花税采用的税率有________、________。

经我国某市税务机关审查确定，A国某公司在华常驻代表机构2006年经费支出额为17万元，则该机构2006年度应纳企业所得税为()万元。

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