vMany students find the experience of attending university lectures to be a confusing and frustrating experience.The lecturer speaks for one or two hours， perhaps __1__ the talk with slides， writing up important information on the blackboard， __2__ r

　　1.A.extending B.illustrating C.performing D.conducting

　　2.A.attributing B.contributing C.distributing D.explaining

　　3.A.assignments B.information C.content D.definition

　　4.A.suspects B.understands C.wonders D.convinces

　　5.A.without B.with C.on D.except

　　6.A.what B.those C.as D.which

　　7.A.teachers B.classmates C.partners D.students

　　8.A.prevent B.require C.assist D.forbid

　　9.A.effective B.passive C.relative D.expressive

　　10.A.Because B.Though C.Whether D.If

　　11.A.enable B.stimulate C.advocate D.prevent

　　12.A.independently B.repeatedly C.logically D.generally

　　13.A.evaluate B.acquaint C.tackle D.formulate

　　14.A.before B.after C.while D.for

　　15.A.predictt B.acknowledge C.argue D.ignore

　　16.A.to require B.required C.requiring D.are required

　　17.A.preventing B.withstanding C.sustaining D.overcoming

　　18.A.average B.ordinary C.normal D.academic

　　19.A.statement B.strategy C.situation D.suggestion

　　20.A.in that B.for which C.with whom D.such as