12．A new research on students'sleeping habits says that more than 70% of students do not get enough sleep．
Researchers found that primary school students get 9hours and 10minutes of sleep a night，junior high school students get 8hours and 6minutes，and senior high school students get 7hours and 9minutes．None of those times are enough for each group．Not enough sleep can cause many kinds of problems in children and teenagers．
In 2007，Shanghai Municipal Education Commission （上海教育委員會） asked primary and middle schools in the city to adjust （調整） their  schedules so that students could get more sleep．Two years later，a research found that students at schools that adjusted their schedules got more sleep than in 2005．
The researchers hope that the government will take measures （措施） to make students have enough sleep．Students in other places may get even less sleep than those in Shanghai．
根據(jù)短文內容，選擇正確的答案．
71．According to the passage，overB of students do not get enough sleep．
A.50%                   B.70%                   C.90%
72．Students in junior high schools getB of sleep a night．
A.9hours and l0minutes     B.8hours and 6minutes     C.7hours and 9minutes
73．The underlined word"schedules"can be best replaced byA．
A．timetables               B．courses                 C．rules
74．The researchers hope that students can have enoughC．
A．food                   B．books                  C．sleep
75．Which of the following is TRUE according to the passage？C
A．This passage is mainly about how to make students have enough sleep．
B．Schools in Shanghai were asked to adjust their schedules because their students got less sleep than those in other cities．
C．Students in senior high schools sleep 57minutes less than those in junior high schools according to the new research．

分析 本文主要向我們介紹了學生睡眠不足的睡眠習慣問題．在2007年，上海教育委員會要求調整作息時間以便讓學生有更多的睡眠．研究人員希望政府采取措施以使他們得到足夠的睡眠．

解答 71 B 細節(jié)理解題：根據(jù)第一段A new research on students'sleeping habits says that more than 70% of students do not get enough sleep一項關于學生睡眠習慣的新研究表明，超過70%的學生睡眠不足．故答案是B．
72 B 細節(jié)理解題：根據(jù)第二段 junior high school students get 8hours and 6minutes初中生每晚獲得8小時6分鐘的睡眠時間．故答案是B．
73 A 詞義理解題：根據(jù)第三段so that students could get more sleep以便學生可以得到更多的睡眠；Two years later，a research found that students at schools that adjusted their schedules got more sleep than in 2005兩年后，一項研究發(fā)現(xiàn)，在調整他們的課程的學校的學生得到更多的睡眠比2005年．推測意思是"時間表"，故答案是A．
74 C 細節(jié)理解題：根據(jù)第四段The researchers hope that the government will take measures （措施） to make students have enough sleep研究人員希望政府采取措施使學生有充足的睡眠．故答案是C．
75 C 細節(jié)理解題：根據(jù)第二段junior high school students get 8hours and 6minutes，and senior high school students get 7hours and 9minutes初中生獲得8小時6分鐘，高中生獲得7小時和9分鐘．故答案C項正確．

點評 本文篇幅短小，詞匯簡短，容易理解，通讀全文，把握細節(jié)，即可正確解答．

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