题目内容

短文填空。
     Are you carrying too much on your back at school? Lots of kids at the same age as you are.
 Experts are starting to __1__ (worry) about that more and more young students are having back and neck
  problems as a result of __2__ (carry) too much in their backpacks.
    "It __3__ (hurt) my back when I run," said Oberlin Reyes, a student in Virginia. "It's hard to __4__
 (get) up the stairs with my backpack, because it's too heavy. "Some students have backpacks with two
 straps to carry them, but a number of other students __5__ (choose) rolling backpacks. But even with
 rolling backpacks, getting up stairs and buses with them __6__ (be) even a problem for kids. Kids are
 losing their balance and __7__ (fall) down with these backpacks. Many of them hurt their knees, backs or
 necks because of heavy school bags. So kids shouldn't __8__ (have) too much homework.
     But how much is too much? Experts say students should carry no more than 10 to 15 percent of their
 own body weight.
     Parents and teachers are starting to tell the kids to only take home the books they __9__ (need) that
  night. Some teachers are __10__ (use) thin workbooks for students to take home.
     One of the best answers is, as some kids themselves want: to have no homework at all!
1. worry   2. carrying   3. hurts  4. get    5. choose   6. is   7. falling  8. have   9. need   10. using
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