1.A.atB.withC.byD.through
2.A.studyB.imitateC.stimulateD.learn
3.A.matesB.relativesC.membersD.fellows
4.A.whichB.thatC.thoseD.ones
5.A.evenB.despiteC.evenifD.inspiteof
6.A.mindB.concernC.careD.involve
7.A.hireB.applyC.adoptD.use
8.A.inpublicB.atmostC.atlargeD.atbest
9.A.rightB.privilegeC.shareD.possession
10.A.consistsB.comprisesC.constitutesD.composes
11.A.seldomB.muchC.neverD.often
12.A.prospectB.wayC.reasonD.necessity
13.A.primaryB.firstC.principalD.prior
14.A.tipsB.mouthC.lipsD.tongue
15.A.besidesB.andC.orD.but
16.A.hearofB.attendC.hearfromD.listen
17.A.formerB.formulaC.formalD.formative
18.A.themeB.topicC.ideaD.point
19.A.borderB.linkC.degreeD.extent
20.A.diversionB.distinctionC.diversityD.similarity
答案与解析：
1.B
本句中由withwhich引导的定语从句，修饰先行词thosewords。短语becomeacquaintedwithsb./sth.意为认识某人，了解某事。
2.D
imitate意为模仿，stimulate意为刺激，激发。study和learn都有学习的意思，study着重研究，而learn指一般性的学习，故选D。