1--5ACBDA

　　6--10DDCCA

　　11--15BBCDA

　　16--20BDACC

　　如选项一致,

　　A.pastB．recentC．oldestD．latest

　　A.citizensB．inventionsC．changesD．advances

　　A.pickB．tellC．takeD．judge

　　A.voiceB．placeC．languageD．way

　　A.disappearedB．stayedC．returnedD．formed

　　A.saidB.talkedC．spokeD．called

　　A.thenB．hardlyC．clearlyD．still

　　A.necessaryB．nativeC．commonD．lively

　　A.ofB．intoC．upD．out

　　A.anotherB．theotherC．noneD．something

　　A.discoveredB．addedC.improvedD．learned

　　A.acceptedB．knownC．introducedD．understood

　　A.newB．shortC．differentD．surprising

　　A.producedB．madeC．developedD．used

　　A.havingB．bringingC．gettingD．making

　　A.typesB．namesC．degreesD．parts

　　A.puttingB．stayingC．livingD．growing

　　A.BritishB．AmericanC．educatedD．ordinary

　　A.familiesB．busesC．moviesD．newspapers

　　A.needB．expectC．seemD．happen