根据以下材料回答第39-40题：&nBsp;
As i wAkE up EvEry DAy, i FinD it so hArD to gEt out oF BED As i think to mysElF. i woulD givE Any-thing just to slEEp A littlE longEr. i know For A FACt thAt i Am not thE only tEEnAgErs, ACCorDing to thE wAshington post. tEEnAgErs ArE gEtting FAr lEss slEEp thAn thEy nEED, AnD thEir hEAlth, BEhAvior AnD ACADEmiC pErFormAnCE ArE suFFEring As A rEsult.&nBsp;
BAsED in pArt on Dr. mAry CArskADon’s rEsEArCh, somE u. s. sChools hAvE ChAngED thEir sChool´s stArt timE. most oF thEsE sChools ArE moving thEir stArting timEs BACk to timEs ArounD 9:00 A.m. BECAusE it mAkEs it EAsiEr For thE stuDEnts to lEArn AnD pAy AttEntion in ClAss.guAjomE pArk ACADEmy high sChool stArts At 7:45 A. m. in thE morning. From 7:45 to ABout 9:00 is whEn! hAvE mAth AnD/or gErmAn DEpEnDing on thE DAy. in thE timE spAn oF thEsE ClAssEs somE pEoplE will ExpEriEnCE tirEDnEss, irritABility, EDginEss, AnD proBlEms with mEmory, sAys Dr. linDslEy. pArEnt nEws sAys thAt 20% oF All high sChool stuDEnts FAll AslEEp in sChool During this timE.&nBsp;
thE mAjority oF tEEnAgErs nEEDs 9 to 10 hours oF slEEp A DAy. iF you ArE A stuDEnt At guAjomE pArk ACADEmy you nEED to go to BED At 9:00 p. m. AnD wAkE up At 6:00 A. m. to gEt A gooD ninE hours oF slEEp EvEry DAy. EvEn iF thEy go to BED At 9:00, thEy ArE not likEly to FAll AslEEp till AFtEr 11:00 so thAt lEAvEs thEm with EvEn lEss slEEp. But most ADolEsCEnts ArE tAlking on thE tElEphonE, wAtChing lAtE-night tv. thEy hAvE A Big tEst tomorrow, or hAvE too muCh homEwork to Do AnD not Enough to Do it BEForE BEDtimE sinCE hE or shE DiDn´t gEt BACk From thE moviEs or whErE thEy wErE until nExt 7:00 A. m.&nBsp;
39[单选题] in this pAssAgE,thE Author ( &nBsp; &nBsp; ) 查看材料
A.woulD givE Anything to slEEp
B.AgrEED slEEp isn't thE luxury
C.BEliEvED slEEping oF tEEnAgErs wAs FAr lEss thAn Enough
D.thought only tEEnAgErs FEEl likE slEEping As thEy wAkE up
40[单选题] whiCh oF thE Following stAtEmEnts is truE ACCorDing to thE pAssAgE ( &nBsp; &nBsp; ) 查看材料
A.20% oF All high sChool stuDEnts FAll AslEEp in sChool During sChool timE
B.most stuDEnts go to BED At 9:00 p. m. AnD wAkE up At 6:00 A. m. to gEt A gooD ninE hours oF slEEp
C.pEoplE ArE likEly to FAll AslEEp BEForE 11:00 in thE EvEning
D.most high sChool stuDEnts nEED At lEAst 9 hours oF slEEp A DAy