Are you carrying too much on your back at school?You’re not alone．Back experts(专家)in the USA are worried about that young students are having back and neck problems because they are carrying too much in their backpacks．
“It hurts my back when I run,”said Ebelin Reyes, a student in Virginia．“It’s hard to get up the stairs with my backpack because it’s too heavy．”Students have to carry heavy backpacks on their backs for a whole week’s study．Ebelin is one of them．They have regular(固定的)backpacks with two straps(带子)to carry them, but a number of students with heavy loads(负担)have switched to rolling backpacks．The backpacks have wheels and can roll on the ground．Shirley Park’s backpack weighs 10 kilos, and she said,“I’ll change to a rolling backpack because I am starting to have back pain．”
How much is too much?Experts say that students should carry no more than 10％ to 15％ of their own body weight．A few students have had a good idea to lighten(减轻)the load：less homework．
Doctor’s suggestions：
(1)Lighten the load．Take home only the books the students need that day．
(2)Wide straps are better．They can send out weight over your shoulders(肩)and be sure to wear backpacks with two straps．
(3)The heaviest things should be packed closest to the back．
(4)Bend(弯曲)both knees when you pick up the pack, don’t just bend over the waist(腰)．
(1)
The main idea of the passage is about ________．
[ ]
A．
the problems made by rolling backpacks
B．
the advantage of backpacks
C．
the best backpacks for students
D．
how to lighten students’ backpacks
(2)
From what Ebelin Reyes and Shirley Park said, we know ________．
[ ]
A．
students like to carry heavy backpacks
B．
students have to do a lot of homework
C．
backpacks with wheels are bad for students
D．
students have no time to play because of heavy backpacks
(3)
The underlined word“switch to”means ________．
[ ]
A．
use for
B．
turn to
C．
catch up
D．
begin to use
(4)
According to the experts, it’s better for a student of 40 kilos to carry a backpack of ________ at most．
[ ]
A．
10 kilos
B．
8 kilos
C．
6 kilos
D．
7 kilos
(5)
If students follow the doctor’s suggestions, they ________．
You will have a lot of reading to do in this grade this year．You can do more of it in less time if you learn to read rapidly．
Perhaps you have been told about some habits (习惯) which keep a person from reading fast and have been strongly asked to break those habits which you might have．
Do you still have any of these bad habits?Check yourself by answering“yes”or“no”to these questions．
(1) Do you move your lips (嘴唇) when reading silently?
(2) Do you point to words with your finger as you read?
(3)Do you move your head from side to side as you read?
(4)Do you read one word at a time?
If you answer“yes”to any of these questions,start at once to break the habit．If you move your tips，hold your fingers over them，or hold a piece of paper be-tween your lips while you are reading．Then if your lips move，your will know it and can stop them．
If you point to words，hold the two sides of your book，one side with your left hand，the other side with your right hand．Then you won't have a free finger to use in pointing while reading．If you move your head，place your chin (下巴) in one hand and hold your head still (静止不动的)．
If you read no more than one or two or three words at a time，you need to work very hard in learning to take in (吸收) more words at each glance (一瞥) as your eyes travel across the lines of words．
Even if you do rather fast now，you can learn to read even faster．As you probably have been told，the secret of fast reading is to take in whole groups of words as each glance．Read in through groups and force (迫使) your eyes along the lines of words as fast as you can to make them go．Anyone who practices doing these things will he able to read faster．
(1)
You may hold your fingers over your lips while reading so as ______．
A．to tell others to be silent
B．to feel whether your lips move or not
C．to hold a piece of paper between them
D．to keep yourself from talking to others
[ ]
(2)
When you read，______．
A．don't keep your head still
B．don't hold your books with your hands
C．don't stand up near a desk
D．don't use your finger to point to words
[ ]
(3)
If you learn to read fast，______．
A．you can read more in less time
B．you can write faster
C．you can understand better
D．you can read less in more time
[ ]
(4)
You must _______ those habits that we are talking about in this reading．
