musiC ComEs in mAny Forms; most CountriEs hAvE A stylE oF thEir own.{{u}} (21) {{/u}}thE turn oF thE CEntury whEn jAzz (爵士乐) wAs Born,AmEriCA hAD no prominEnt{{u}} (22) {{/u}}oF its own. no onE knows ExACtly whEn jAzz wAs{{u}} (23) {{/u}}, or By whom.But it BEgAn to BE{{u}} (24) {{/u}}in thE EArly 1900s. jAzz isAmEriCA’s ContriBution to{{u}} (25) {{/u}}musiC、in ContrAst to ClAssiCAl musiC, whiCh{{u}} (26) {{/u}}FormAlEuropEAn trADitions. jAzz is spontAnEous AnD FrEE-Form. it BuBBlEs with EnErgy, {{u}} 27 {{/u}}mooDs, intErEsts, AnD Emotions oF thE pEoplE. in thE 1920s, jAzz{{u}} (28) {{/u}}likEAmEriCA、AnD{{u}} (29) {{/u}}it DoEs toDAy. thE{{u}} (30) {{/u}}oF this musiC ArE As intErEsting As thE musiC{{u}} (31) {{/u}},AmEriCAn nEgroEs, or BlACks, As thEy ArE CAllED toDAy wErE thE jAzz{{u}} (32) {{/u}}. thEy wErE Brought to thE southErn stAtEs {{u}} (33) {{/u}}slAvEs. thEy wErE solD to plAntAtion ownErs AnD ForCED to work long{{u}} (34) {{/u}}. whEn A nEgro DiED, his FriEnDs AnD rElAtivEs{{u}} (35) {{/u}}A proCEssion to CArry thE BoDy to thE CEmEtEry. in nEw orlEAns, A BAnD oFtEn ACCompAniED thE{{u}} (36) {{/u}}. on thE wAy to thE CEmEtEry thE BAnD plAyED slow, solEmn musiC suitED to thE oCCAsion,{{u}} (37) {{/u}}on thE wAy homE thE mooD ChAngED、spirits liFtED、DEAth hAD rEmovED onE oF thEir{{u}} (38) {{/u}}, But thE living wErE glAD to BE AlivE. thE BAnD plAyED{{u}} (39) {{/u}}musiC, improvising (即兴表演) on Both thE hArmony AnD thE mEloDy oF thE tunEs{{u}} (40) {{/u}}At thE FunErAl. this musiC mADE EvEryonE wAnt to DAnCE. it wAs An EArly Form oF jAzz.

A．BEForE
B．At
C．in
D．on