FrAnk lloyD wright proBABly is thE grEAtEst ArChitECt thAt thE unitED stAtEs hAs EvEr proDuCED、hE wAs vEry{{u}} (21) {{/u}}AnD hAD A nAturAl ABility{{u}} (22) {{/u}}. his BuilDings wErE not only BEAutiFul, But thEy wErE{{u}} (23) {{/u}}FunCtionAl. thEy Fit thEir purposEs vEry wEll. wright’s ChurChEs, {{u}} (24) {{/u}}mAkE pEoplE FEEl likE{{u}} (25) {{/u}}. his oFFiCE BuilDings mAkE pEoplE{{u}} (26) {{/u}}working, AnD his housEs mAkE pEoplE{{u}} (27) {{/u}}ComFortABlE, At homE. howEvEr. wright’s BEAutiFul, {{u}} (28) {{/u}}BuilDings ArE not thE only rEAson{{u}} (29) {{/u}}hE is FAmous. thErE is AnothEr rEAson. FrAnk lloyD wright is CAllED thE grEAtEstAmEriCAn ArChitECt BECAusE hE stArtED AnAmEriCAn stylE{{u}} (30) {{/u}}. most oF thE ArChitECturE in thE u. s. BEForE wright wAs rEAllyEuropEAn, {{u}} (31) {{/u}}. wright’s BuilDings Do not{{u}} (32) {{/u}}olDEuropEAn BuilDings. thEy hAvE thEir own{{u}} (33) {{/u}}. wright’s iDEAs ABout stylE ArE still usED in thE u. s. AnD in othEr pArts oF thE worlD、 thE most importAnt iDEA in FrAnk lloyD wright’s stylE oFArChitECturE is thAt A BuilDing must{{u}} (34) {{/u}}AnD thE lAnD ArounD it . his housEs ArE oFtEn CAllED "grAsslAnD housEs" BECAusE thEir linEs ArE{{u}} (35) {{/u}}to thE linEs on thE grAss lAnD、{{u}} (36) {{/u}}thE linEs oF thE grAsslAnD AnD thE linEs oF wright’s housEs{{u}} (37) {{/u}}thE horzon, thE plACE{{u}} (38) {{/u}}EArth AnD sky sEEm to mEEt. thEy ArE horizontAl linEs. mostEuropEAn stylE housEs, {{u}} (39) {{/u}}, hAvE mAny vErtiCAl linEs thAt Form 90° AnglEs{{u}} (40) {{/u}}thE horizon.

A．still
B．Also
C．yEt
D．howEvEr