阅读（一）
During the rest of sleep, the fatigue (疲劳) of the body disappears and recuperation (复原) begins. The tired mind gathers new energy; The memory improves; and annoyance and problems are seen correctly.
Some adults require little sleep , others need eight to ten hours in every twenty-for. Infants sleep sixteen to eighteen hours daily, the amount gradually decreasing as they grow older. Young students may need twelve hours; university students may need ten. A worker with a physically demanding job may also need ten , whereas an executive working under great pressure may manage on six to eight. Many famous people are well known to have required little sleep . Napoleon Bonaparte, Thomas Edison , and Charles Darwin apparently averaged only four to six hours a night.
Whatever your individual need , you can be sure that by the age of thirty you will have slept for a total of more than twelve years. By that age you will also have developed a sleep routine : a favorite hour, a favorite bed .a favorite posture (姿势)，and a formula you need to follow in order to rest comfortably.
Investigators have tried to find out how long a person can go without sleep. Several people have reached more than 115 hours-nearly days. Whatever the limit, it is absolute Animals kept awake for from five to eight days have died of exhaustion. The limit for human beings is probably about a week.
1.It is implied in the passage that__.
A. a light sleep is as refreshing as a deep one
B. sleep is important for good mental and physical health
C. memory is greatly improved during sleep
D. famous people need less sleep that ordinary people
2.It can be concluded from the passage that the amount of sleep required___,
A. depends on the bed one sleeps in
B. varies greatly from one individual to another
C. can be predicted from the type of job one has
D. is closely related to the amount of pressure one suffers
3.The word ―formula‖ (line 3, paragraph 3) most probably means___
A. a prescription
B. a mathematical rule
C. a fixed method or approach
D. an expression of the elements of a compound
4.A person should __ in order to sleep well.
A. follow his sleep routine
B. go to bed early
C. sleep as much as he can
D. do a physically demanding job
5.The longest time a human being can survive without sleep is probably.
A. five days
B. seven days
C. ten days
D. twelve days
阅读（二）
As prices and building costs keep rising , the “do-it-yourself ”(DIY) trend (趋势) in the U.S
