American people have the habit of saying “Thank you” when something kind is done for them or something polite is said to them, no matter how easy the thing is. This habit is learned by people of many　 46　 countries.

　 You should say “Thank you” when someone　 47　 you the salt on the table, when someone steps aside to let you　 48　 in a corridor (走廊), when someone　 49　 ahead of you keeps the door open　 50　 you, when someone says your work is well　 51　 or you have bought a nice thing, or your city is very beautiful. “Thank you” is　 52　 not only between strangers or new friends, but also between old friends, parents and children, brothers and sisters, husbands and wives. Parents often tell　 53　 children that they should say “Thank you” in answering to a kind word or act when they are only four　 54　 five years old. Perhaps that’s 　 55　 almost everyone has got this habit.

(　　 ) 46. A. others　　 　　　　　　　 B. another　　　 C. other　　 　　　 D. else

(　　 ) 47. A. puts　　　 　　　　　　　 B. passes　　　 　 C. carries　　　 　　　 D. borrows

(　　 ) 48. A. pass　　　 　　　　　　　 B. jump　　　 　 C. sing　　　　 D. dance

( 　　) 49. A. jumps　　 　　　　　　　 B. walks　　　 C. sits　　　　 　 D. walking

(　　 ) 50. A. to　　　　 　　　　　　 B. with　　　 　　　　　 C. for　　　　 D. on

(　　 ) 51. A. made　　　 　　　 B. done　　 　　　　　　 C. built　　　　 D. doing

(　　 ) 52. A. tell　　　　 　　　 B. said　　　 　　 　　　 C. to say　　 　　　　　　 D. told

(　　 ) 53. A. his　　　　 　　　 B. theirs　 　　　　　 C. their’s　 　　　 D. their

(　　 ) 54. A. but　　　　 　　　　　　 B. and　　　 　　　　　　 C. or　　　 　　　　　　 D. so

(　　 ) 55. A. why　　　　　 　　　　　　 B. because　　　 C. when　　　 　　　　　 D. reason

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　　Are you carrying too much on your back at school? I'm sure lots of the (1) of your age will say“Yes”.

　　Not only the students in China have this problem, but also children in the United States have (2) schoolbags.

　　Doctors are starting to (3) that younger and younger students are having (4) problems as a result of school bags being too heavy for them.

　　“It's hard for me to (5) with my bag because it's so heavy.”said Rick Hammond, an 11-year-old student in the US.

　　Rick is (6) the students who have common schoolbags with two straps (带子)to carry them, (7) many students choose rolling(滚动的)bags.

　　But even with rolling bags, getting upstairs and buses is still a problem for children. Many of them (8) their necks and backs because of the heavy schoolbags.

　　But (9) 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 (10) Grade 4 should stay with 10％. But it is also important that older children don't stay over 15％, because their bodies are (11) .“Children are losing their balance(平衡)and (12) with their schoolbags,”he said.

　　Parents and teachers are starting to tell children to only take home the books they be reading (13) . Some teachers are using pieces of paper or (14) workbooks for students to take home.

　　One of the best answers is, as some children said, to have (15) homework at all!

(1)

[　　]

A. teachers	B. parents
C. children	D. old people

(2)

[　　]

A. small	B. big
C. heavy	D. light

(3)

[　　]

A. forget	B. remember
C. worry	D. hope

(4)

[　　]

A. arm and leg	B. hand and arm
C. head and neck	D. back and neck

(5)

[　　]

A. go to bed	B. go into the classroom
C. go upstairs	D. go shopping

(6)

[　　]

A. among	B. of
C. between	D. in

(7)

[　　]

A. because	B. so
C. but	D. if

(8)

[　　]

A. break	B. hurt
C. carry on	D. look after

(9)

[　　]

A. what size	B. how many
C. how	D. how much

(10)

[　　]

A. of	B. over
C. under	D. like

(11)

[　　]

A. important	B. growing
C. moving	D. interesting

(12)

[　　]

A. catching up	B. standing up
C. going on	D. falling down

(13)

[　　]

A. next night	B. that night
C. tomorrow evening	D. last night

(14)

[　　]

A. thick	B. thin
C. heavy	D. big

(15)

[　　]

A. some	B. much
C. few	D. no