二、完形填空。（每小题1分，共15分）
An increasing number of teenagers and young adults are having problems 1 because of great study pressure or the overuse of the smartphone, as health experts call for families and schools to pay greater 2 to the sleep quality of the youth.
Lu Lin, a famous psychologist(心理学家）at the Chinese Academy of Sciences, said that while sleep disorders are believed to 3 influence middle-aged adults and the elderly, more and more youngsters said they get 4 sleep and even need to take sleeping pills.
The study 5 that insomnia(失眠症）, breathing problems during sleep and other sleep disorders influence about 36 per cent of the elderly and 26 per cent of teenagers in China, 6 Lu, who is also president of Peking University Sixth Hospital.
Sleep plays an important role in the normal 7 of the mind and body, and the lack of sleep could harm the cognitive capacities(认知能力）of children and teenagers, 8 their memory and focus.
Lu said that children and teenagers should have 9 eight hours of sleep per day. “However, I have young 10 who only sleep five hours a day. They go to bed after the last class finishes at 11:00 p. m. and 11 up as early as 5:30 a. m. for an early workout,” he said during an event held over the weekend ahead of this year’s World Sleep Day.
Lu said that a large number of children cannot 12 their time and begin having health problems that can influence them for the rest of their lives. What’s more, he believed that it is 13 to tell families and schools the importance of sleep and ask them not to prioritize(优先考虑）school grades over sleep and health.
Liu Yanjiao, from Guang’anmen Hospital, 14 a short period of sleep during the day for anyone who slept late or experienced disordered sleep patterns the night before. He also advised young people not to depend on sleeping pills because of some 15 risks.
(
B
)1. A. walking B. sleeping C. studying D. playing
(
C
)2. A. money B. interest C. attention D. time
(
D
)3. A. nearly B. seldom C. hardly D. mainly
(
B
)4. A. good B. poor C. enough D. perfect
(
A
)5. A. shows B. tells C. speaks D. talks
(
C
)6. A. instead of B. thanks to C. according to D. because of
(
D
)7. A. agreement B. movement C. treatment D. development
(
C
)8. A. except B. beside C. including D. without
(
B
)9. A. at most B. at least C. in total D. in fact
(
C
)10. A. teachers B. doctors C. patients D. students
(
A
)11. A. wake B. stay C. put D. give
(
B
)12. A. save B. manage C. waste D. kill
(
C
)13. A. difficult B. interesting C. necessary D. different
(
A
)14. A. suggested B. refused C. doubted D. accepted
(
D
)15. A. significant B. obvious C. tiny D. possible
