Are you carrying too much on your back at school? Lots of kids(孩子) 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(背包)with two straps(带子) to carry them, 8 a number of other students choose rolling backpacks. But 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

　　参考答案

　　1—5 DDCAB 6—10 DDBAB 11—15 CADBC 16—20 CABDA

　　1.选D。根据后面的also fed up with(也饱受……之苦)选定。

　　2.选D。not only…but also系习惯搭配。

　　3.选C。学生负担重，是一个人人皆知的现象，无需专家指出，故排除A、B、D三个选项。

　　4.选A。of后是一个介词短语，故选非谓语动词being。

　　5.选B。由副词up可排除另三个选项。

　　6.选D。此处表示泛指，故用不定冠词，又由于eleven以元音开头，所以选择an。

　　7.选D。这里的regular等于usual，意为“正常的、通常的”。

　　8.选B。前后意义在此形成转折。

　　9.选A。上文已呈现过这一说法，此外，另三个选项不能与bus搭配。

　　10.选B。根据even选定。

　　11.选C。 由主语中的much推定。

　　12.选A。no more than意为“仅仅”。not more than意为“不超过”，须后接一个固定值，10 to 15表示的是一个区间，数值并不固定。

　　13.选D。通过排除法选定。儿科医生用baby doctor，所以A是不能选用的。

　　14.选B。stay表示“坚持，承受”。另三词后面不能用with。

　　15.选C。 beyond意为“超出”。前面已交待过学生背负的重量应在自身体重量的10%至15%之间，即不能“超出”15%。

　　16.选C。背着背包跌倒的原因就是身体“失去”平衡。

　　17.选A。第18空后再现了take home这一说法，此外，另三个词是名词，应排除。

　　18.选B。这里讨论的是作业的量，而不是质，故选thin。

　　19.选D。全文谈的是学生学习负担沉重的事，因此，由themselves ，我们首先联想到的是kids。

　　20.选A。at all在否定句中表示强调。