【阅读理解.Ifyouarehavingtroublefallingasleep,youareingoodcompany.About65%ofAmericanssaidtheyhavesleepingproblemsafewnightseachweek,accordingtoarecentstudybytheNationalSleepFoundation.Sleepingtoolittleca】

　　阅读理解.

　　Ifyouarehavingtroublefallingasleep,youareingoodcompany.About65%ofAmericanssaidthey

　　havesleepingproblemsafewnightseachweek,accordingtoarecentstudybytheNationalSleep

　　Foundation.Sleepingtoolittlecanleadtoahigherriskofbecomingfatandgettingdepressed(沮丧的).

　　Butbeforeyougotoadoctorforadvice,itisworthexaminingyoursleepinghabitsonemoretime.Some

　　ofyourfavoriteeveninghabitsmayhavesomethingtodowiththesleepingproblems.

　　1.SettingaBrightAlarmClock.

　　Thelightofyourbrightalarmclockcanpreventyoufromfallingasleep.Youcanmakeyourroomas

　　darkaspossible.Coverthebrightnumberswithabookorconsiderbuyingasmalltravelclock.Your

　　cellphonealarmmayalsodothetrick.

　　2.CountingSheep

　　Whenyoujustcan'tfallasleep,it'suselesstostayinbedtocountsheep.Ifyou'vebeentryingtofall

　　asleepformorethan30minutes,theNationalSleepFoundationsuggestsyougetuptodosomereading

　　orwatchTVforawhile.Suchactivitieswillmakeyousleepy.Beforeyouknowit,you'llbegoingback

　　tobedreallytired.

　　3.ExercisingLateatNight

　　Daytimeworkouts(锻炼)willkeepyoufullofenergyforhours.That'swhyyoudon'twanttoexercisewithinthreehoursofhittingthesack.Fierce(剧烈的)physicalactivityraiseyourbodytemperatureand

　　pumpsyourenergylevel-botharebadforagoodnight'ssleep.

　　1.Whatcanwelearnfromthefirstsentenceofthepassage?A.It'snotgoodtofailtofallasleepatnight.

　　B.Peopleinagoodcompanyoftenhavesleepingproblems.

　　C.Therearemanypeoplewhohavesleepingproblems.

　　D.Youshouldfindsomeonetotalktoifyoucan'tfallasleep.2.Theunderlinedpart"hittingthesack"inthelastparagraphmeans"______".A.goingbackhome

　　B.goingtobed

　　C.goingtothegym

　　D.fallingasleep 3.Whichofthefollowin