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 schools 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 in 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 Bautch, 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 hurt
B．his head and arms will be hurt
C．his hands will be hurt
D．his feet will be hurt
小題4:According to the doctor, Scott Bautch, 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 his problems 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 thick ones

小題1:C           
小題1:B
小題1:A
小題1:D
小題1:B

本文講的是書包太重給學生帶來的問題。
1. C 細節(jié)題。根據(jù)Not only the students in China have this problem, but children in the United States also have heavy school bags可知不但中國學生有書包太重這個問題，而且美國也有，故選C。
2. B 細節(jié)題。答案來自說話的內(nèi)容：It’s hard for me to go upstairs with my bag because it’s so heavy，可知是書包重導致的結(jié)果，故選B。
3. A 定位到第二段，根據(jù)younger and younger students are having back and neck problems as a result of schools bags being too heavy for them可知是學生的背部和頸部出現(xiàn)了問題，故也受到了傷害，選A。
4. D 此題是個計算題。從文中Doctors say students should carry no more than 10% to 15%及don’t stay with over 15 %可知，最大的承受量是30*15%＝4.5，故選D。
5. B 細節(jié)題，答案來自文章最后一句，One of the best answers is, as some children said, to have no homework at all是說不要做任何的作業(yè)，故選B。
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