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56、根据材料，回答56-75题。
Directions: There are 20 blanks in the following passage, and for each blank there are 4 choices marked A, B, C and D at the end of the passage． You should choose ONE answer that best fit into the passage．Then blacken the corresponding letter on the Answer Sheet．

Enoughsleepisimportanttohealth．Theamountofsleep56dependsontheageofthepersonandtheconditionsinwhichsleep57．Theyoungmayneedmoresleepthantheold,but58eighthoursareenoughforthe59ofgrownups．somecan60withlessthanthisamountbut61mayneedmore．Everypersonknowshisown62．Itisthenamatterofhowto63it．Sleepshouldalwaysbe64tomakeonerelaxedandreadyfor65work．Freshairis66tosoundsleep．Itisnot67reasonforsomepeopleto68thatitispracticaltosleepintheopenair．69apersoncankeephimselfwarm,70sleepingprobablygivesthebody71completerelaxation．Abilitytosleepislargelya72．Out-of-door73,agoodhabitofregular74,theavoidance(避免)oflateeating,and75areallhelpfultosoundsleep．

第56题答案为
A．wanted
B．expected
C．wished
D．needed


57、 第57题答案为
A．falls down
B．breaks out
C．wakes up
D．takes place


58、 第58题答案为
A．seldom
B．sometimes
C．always
D．generally


59、 第59题答案为
A．health
B．heads
C．night
D．work


60、 第60题答案为
A．wake
B．work
C．do
D．finish


61、 第61题答案为
A．children
B．women
C．others
D．few


62、 第62题答案为
A．need
B．enough
C．short
D．long


63、 第63题答案为
A．help
B．satisfy
C．demand
D．take


64、 第64题答案为
A．Deep
B．enough
C．short
D．long


65、 第65题答案为
A．hard
B．his own
C．a day's
D．good