{{B}}tExt{{/B}} A、spECiAl lAB At thE univErsity oFChiCAgo is Busy only{{u}} (26) {{/u}}. it is A DrEAm{{u}} (27) {{/u}}whErE rE- sEArChErs ArE At work{{u}} (28) {{/u}}DrEAmErs. thEir FinDings hAvE ConCluDED thAt{{u}} (29) {{/u}}DrEAms From thrEE to sEvEn timEs EACh night,{{u}} (30) {{/u}}in orDinAry liFE A pErson mAy{{u}} (31) {{/u}}nonE or only onE oF his DrEAms. whilE thE{{u}} (32) {{/u}}slEEp, spECiAl mAChinEs{{u}} (33) {{/u}}thEir BrAin wAvEs AnD EyE movEmEnts As wEll As thE BoDy movEmEnts thAt{{u}} (34) {{/u}}thE EnD oF A DrEAm. surprisingly, All suBjECts{{u}} (35) {{/u}}sounDly. {{u}} (36) {{/u}}sAy thAt A pErson usuAlly FiDgEts(烦躁) BEForE A DrEAm.{{u}} (37) {{/u}}thE DrEAm hAs stArtED, his BoDy rElAxEs AnD his EyEs{{u}} (38) {{/u}}morE ACtivE, As iF thE CurtAin{{u}} (39) {{/u}}on A show. whEn thE mAChinE{{u}} (40) {{/u}}thAt thE DrEAm is ovEr, A BuzzEr wAkEs thE{{u}} (41) {{/u}}. hE sits up, rECorDs his DrEAm, AnD goEs BACk to slEEp—pErhAps to{{u}} (42) {{/u}}somE morE. rEsEArChErs hAvE FounD thAt iF thE DrEAmEr, is{{u}} (43) {{/u}}immEDiAtEly AFtEr his DrEAm, hE CAn usuAlly rECAll thE EntirE DrEAm. iF hE is AllowED to slEEp EvEn{{u}} (44) {{/u}}his{{u}} (45) {{/u}}oF thE DrEAm will hAvE FADED、thAt’s why most pEoplE hAvE mAny DrEAms At night, But ForgEt most oF thEm in thE morning.

A．onCE
B．nEvEr
C．hArDly
D．FrEquEntly