完形填空。 When school students are complaining of homework tiredness, what's a well-meaning(好心的) parent to do? Let's listen to what the experts recommend. As hard as it may be, sit back and keep cool, experts 1 . Though you've got to get them to do it, by 2 too much, or even examining 3 too carefully, you may 4 them from doing it by themselves. ' I wouldn't advise a parent to check every 5 exercise,' says psychologist(心理学家) John Rosemond, author of Ending the Tough Homework, 'There is a 6 of understanding for trial and error(错误). Let your children 7 the grade they are worthy of.' Many experts believe parents should gently look over the work of younger children and ask them to rethink about their 8 , but don't want them to feel it has to be 9 . That's not to say parents should pay no attention to 10 first, they should monitor how mush homework their kids 11 . Thirty minutes a day in the early elementary(基础) years and an hour in 12 four, five, and six is standard. For junior-high students it should be no 13 than an hour and a half, and two for high-school students. If your children 14 has more homework than this, you may check with other 15 and then talk to the teacher about reducing homework. (     ) 1. A. demand (     ) 2. A. depending (     ) 3. A. puzzles (     ) 4. A. interrupt (     ) 5. A. single (     ) 6. A. drop (     ) 7. A. fail (     ) 8. A. exercises (     ) 9. A. perfect (     )10. A. grade (     )11. A. have (     )12. A. classes (     )13. A. later (     )14. A. hardly (     )15. A. parents B. explain B. helping B. standards B. disturb B. practical B. cut B. identify B. mistakes B. unusual B. mistakes B. make B. grades B. sooner B. merely B. teachers C. persuade C. talking C. answers C. encourage C. simple C. lot C. earn C. achievements C. boring C. examination C. prepare C. groups C. more C. seldom C. officials D. suggest D. thinking D. rules D. keep D. difficult D. lack D. tolerate D. tests D. complete D. homework D. perform D. terms D. less D. always D. schools