6、heauthorstressinParagraph1?A.Manystudentsareabsentfromclass.B.StudentsareverytiredonMondaymornings.C.Studentsdonotadjusttheirsleeppatternswell.D.StudentsarenotwellpreparedforclassonMondays.答案 C [细节理解题。本段最后一句话对以上所述进行总结,也是本段的大意。由此可知C项正确。]2.WhichofthefollowingistrueaccordingtoPar
7、agraph2?A.Moststudentsprefertogetuplateinthemorning.3B.Studentsdon'tsleepwellbecauseofalertingsystems.C.One'sbodyclockgovernsthesleep/wakecycleindependently.D.Adolescents'delayedsleep/wakecycleisn'tthepreferredpattern.答案 D [细节理解题。根据“Typically,thepreferredsleep/wakecycleisdelay