Areyoucarryingtoomuchonyourbackatschool?Lotsofkidsat...

問題詳情：

    Are you carrying too much on your back at school? Lots of kids at the same age are as you are. Not only are students in China    21  from this problem, But kids in the United States are    22   fed up with heavy school bags. Experts are starting to   23   that more and more young students are having back and neck problems as a result of school bags   24   too heavy for them. “It’s hard for me to get up the    25   with my bag because it’s so heavy,” said Rich Hammond,   26    11-year-old student in the US. Rich is among the students who have   27   backpacks with two straps(帶子) to carry them,    28    a number of other students choose rolling backpacks. But even with rolling backpacks,    29   up stairs and buses with them is   30    a problem for kids. Many of them have hurt their knees, backs or necks because of heavy school bags.     But how much is too     31   ? Experts say students should carry    32    more than 10 to 15 percent of their own body weight. Scott Bautch, a Wisconsin    33   doctor, said kids under 4th grade should    34   with 10 percent. But it’s also important that older kids don’t go    35    15 percent, because their bones are still growing. Bautch explained that there are other injuries caused by backpacks. “Kids are    36   their balance and falling down with these backpacks,” he said.    Parents and teachers are starting to tell the kids to only take    37   library books they will be reading that night. Some teachers are using worksheets or    38    workbooks for students to take home.  One of the best answers is, as some    39   themselves suggested, to have no homework    40   !  21.A. facing       B. meeting              C. suffering     D. experiencing  22. A. also                B. already           C. yet                     D. always  23. A. explain        B. say                  C. announce             D. worry   24. A. be              B.  being          C. are                      D. is  25. A. schools        B. houses           C. stairs                   D. homes  26. A. this           B. an                  C. a                    D. that  27. A. common       B. unusual          C. special                D. strange     28. A. when            B. and                  C. then                     D. but  29.A. going            B. climbing         C. getting                  D. turning  30.A. still                B. only            C. even                    D. just  31.A. more             B. very                 C. many                 D. much    32.A. too              B. no             C. any                       D. much  33.A. children        B. student          C. back                     D. bag  34.A. stay             B. carry                C. take                 D. bring  35.A. about            B. under                C. before               D. beyond    36.A. keeping          B. losing           C. missing              D. making  37.A. home             B. class                C. school               D. city  38.A. valuable        B. important         C. thin             D. interesting  39.A. kids             B. teachers         C. parents                  D. reports   40.A. for all           B. after all              C. in all                   D. at all

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