语法功能词。
测试标的涉及语法功能词的空缺在PETS试卷中的比例还是比较大的，语法功能词与实义词的不同之处在于这些词是语法信息的载体，即功能词所含的语法方面的信息量特别大，在这个意义上，我们把代词和助动词也归入功能词的范畴。这类空格的选择主要涉及考生的语法知识。
Music comes in many forms;most countries have a style 0f their ownlthe tum。l the century when iazzwas born，America had no prominent2of its ownNo one knows exactly when jazz was 3.orbv whom，but it began to be4in the early 1 900s.Jazz is America g contribution 5 music.1n contrast m classical music，which6formal European traditions，jazz is spontaneou。and lree-trom.
lt bubbles with energy，一7 the moods，interest，and emotions。f the peopleIn the 1920s jazz一8 like America.and 9 it does today.The10。f this music are as interesting.as the music11-American Ncgroes.or blacks，as they are cailed today，were the jazz12.They were brought t。Southern States 13slayes.They were sold t0 plantation owners and forced to work long14.Whell a Negro died his friends and relatives15a processton to carry he body to the cemetery.In New 0rlcans，a band often accompanide the 16.On me way to the cemetery the band played slow，slemn music suited to the occasion.17 on the way home the mood changed.Spirits 1med.Death had removed one 0f meiT18，but the liring were glad to be alive.The band played19musk，improvisingon both the harmon~and the mlldy of the tunes 20 at the funeral.This music made everyone want to dance.It was an early f01311 Of jazz.
1.A.ByB.AtC.InD.0n
2.A.musicB.songC.melodyD.styl。
3.A.discoveredB.actedC.inventedD.designed
4.A.noticedB.foundC.1istenedD.heard
5.A.classicalB.sacredC.popular D.1ight
6.A.formsB.followsC.approaehesD.introduces
7.A.expressingB.explainingC.exposing D.illustrating
8.A.appearedB.feltC.seemedD.sounded
9.A.asB.soC.either D.neithef
10.A.originsB.originalsC.distoveries D.resources
11.A.concernedB.itselfC.availableD.oneself
12.A.playersB.followersC.fansD.pioneers
13.A.forB.asC.withD.})y
14.A。monthsB.weeksC.hours D.times
15.A.demonstratedB.composedC.hostedD.f10rifled
16.A.demonstrationB.processionC.badyD.mareh
17.A.EvenB.TherefloreC.Furthermore D.But
18.A.humberB.memberC.bodiesD.relations
19.A.sadB.solemllC.happyD.funeral
20.A.whistledB.sungC.presentedD.showed