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Are you carrying too much on your back at school? Lots of kids at the same age as you are. Not only are students in China ___1___ from this problem, but kids in the United States are ___2___ fed up with（饱受…之苦） heavy school bags. Experts are starting to___3___ that more and more young students are having back and neck problems as a result of school bags ___4___ too heavy for them. “It’s hard for me to get up the___5___ with my bag because it’s so heavy,” said Rich Hammond, ___6___ 11-year-old student in the US. Rick is among the students who have ___7___ backpacks with two straps (带子) to carry them, ___8___ a number of other students choose rolling backpacks. However, even with rolling backpacks, ___9___ up stairs and buses with them is ___10___ a problem for kids. Many of them have hurt their knees, backs or necks because of heavy school bags. But how much is too ___11___? Experts say students should carry ___12___ more than 10 to 15 per cent of their own body weight. Scott Bautch, a Wisconsin ___13___ doctor, said kids under 4th grade should ___14___ with 10 per cent. But it’s also important that older kids don’t go ___15___ 15 percent, because their bones are still growing. Bautch explained that there are other injuries caused by backpacks. “Kids are ___16___ their balance and falling down with these backpacks,” he said． Parents and teachers are starting to tell the kids to only take ___17___ library books they will be reading that night. Some teachers are using worksheets (作业纸) or ___18___ workbooks for students to take home. One of the best answers is, as some ___19___ themselves suggested, to have no homework ___20___! 1.A．meeting B．facing C．experiencing D．suffering 2.A．already B．always C．yet D．also 3.A．explain B．say C．worry D．announce 4.A．being B．be C．are D．is 5.A．schools B．stairs C．houses D．homes 6.A．this B．that C．a D．an 7.A．special B．unusual C．ordinary D．regular 8.A．when B．but C．then D．and 9.A. getting B．climbing C．going D．turning 10.A．only B．still C．even D．just 11.A．more B．very C．much D．many 12.A．no B．not C．any D．much 13.A．children B．student C．bag D．back 14.A．carry B．stay C．take D．bring 15.A．about B．under C．beyond D．before 16.A．keeping B．missing C．losing D．making 17.A．home B．class C．school D．city 18.A．valuable B．thin C．important D．interesting 19.A．reports B．teachers C．parents D．kids 20.A．at all B．after all C．in all D．for all
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The storm left, _________ a lot of damage to this area. A. caused B. to have caused C. to cause D. having caused
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After a 3-month drought, the rain _______ a good crop this year. A. brought B. managed C. made D. guaranteed
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The officers narrowly escaped_____ in the hot battle. A. have killed B. to kill C. to be killed D. being killed
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One of the judges __________ to Gana’s film festival was a famous artist from China, Zhang Ziyi. A. invited B. to invite C. had been invited D. being invited
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Don’t turn the room __________, as I have just tidied it. A. upside down B. inside C. outside D. inside down
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Students are encouraged to _________ the design competition for robots at the university. A. take part B. operate C. join to D. participate in
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Having fish at meals regularly can be of great _________ to your heart. A. benefit B. help C. contribution D. use
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I don’t think highly of this kind of flower — _________, I don’t care for it. A. in other words B. all in all C. after all D. in the meantime
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Little Tom easily ________ himself to the American life as he moved to the USA with his parents when he was only three. A. suited B. adapted C. matched D. fit
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