Are you carrying too much on your back at school? I’m sure lots of children of your age will say “Yes”. Not only the students in China have this problem, but children in the United States also have heavy school bags.
Doctors are starting to worry that younger and younger students are having back and neck problems as a result of school bags being too heavy for them.
“It’s hard for me to go upstairs with my bag because it’s so heavy,” said Rick Hammond, an 11-year-old student it the US.
Rick is among students who have common school bags with two straps(帶子)to carry them, but many other students choose rolling(有滾輪的)bags.
But even with rolling bags, getting up stairs and buses is still a problem for children. Many of them have hurt their backs and necks because of the heavy school bags.
But how much is too much? Doctors say students should carry no more than 10% to 15% of their own body weight(重量).
Scott Batch, a back doctor, said children under Grade 4 should stay with 10%. But it is also important that older children don’t stay with over 15%, because their bodies are still growing.“
Children are losing their balance(平衡)and falling down with their school bags,” he said.
Parents and teachers are starting to tell children to only take home library books they will be reading that night. Some teachers are using pieces of paper or thin workbooks for students to take home.
One of the best answers is, as some children said, to have no homework at all!
小題1:From the passage we can know that     .
A．only children in China carry too heavy school bags
B．children in other countries don’t carry too heavy bags
C．both children in China and the US carry too heavy school bags
D．only children in the US carry too heavy school bags
小題2:Children feel it hard for them to go upstairs because      .
A．they are too young
B．their school bags are too heavy
C．they don’t know how to go upstairs
D．their parents don’t always go upstairs with them together
小題3:If a child carries a heavy school bag,      .
A．his back and neck will be hurtB．his head and arms will be hurt
C．his hands will be hurtD．his feet will be hurt
小題4:According to the doctor, Scott Batch, if a child in Grade 5 weighs(重)about 30 kilos, the school bag he carries should not be over      .
A．5 kilosB．3 kilosC．5.5 kilosD．4.5 kilos
小題5:Some students think the best answer to this problem is that     .
A．they should have a little homework to do after they get home
B．their teachers had better not ask them to do any homework
C．they should only take home library books they will read that night
D．they should use thin workbooks instead of think ones

小題1:C
小題2:B
小題3:A
小題4:D
小題5:B

試題分析：本文主要介紹了中國和美國的學(xué)生都面臨的書包太重的問題，而且過種的書包還給孩子的健康帶來問題。
小題1:C 細節(jié)題。根據(jù)文章第一段最后一句Not only the students in China have this problem, but children in the United States also have heavy school bags.可知中國和美國的學(xué)生的書包都比較重，學(xué)習(xí)的負擔都很重。故C正確。
小題2:B 細節(jié)題。根據(jù)文章第3段It’s hard for me to go upstairs with my bag because it’s so heavy,” said Rick Hammond, an 11-year-old student it the US.可知學(xué)生很難爬樓梯主要是因為書包太重了。故B正確。
小題3:A 細節(jié)題。根據(jù)文章第2段Doctors are starting to worry that younger and younger students are having back and neck problems as a result of school bags being too heavy for them.可知醫(yī)生告訴我們?nèi)绻⒆拥臅�，他們的背部可能會出現(xiàn)問題。故A正確。
小題4:D 計算題。根據(jù)Doctors say students should carry no more than 10% to 15% of their own body weight(重量).
可知學(xué)生的書包的重量最好不要超過體重的百分之15.如果體重是30公斤，書包最多4.5公斤。故D正確。
小題5:B 細節(jié)題。根據(jù)文章最后一句One of the best answers is, as some children said, to have no homework at all!
可知沒有家庭作業(yè)是最好的解決方法。故B正確。
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A．Because it can involve more people.
B．Because it can create worse effects.
C．Because it is more convenient.
D．Because it can avoid cheating.
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