短文改错
此题要求改正所给短文中的错误。对标有题号的每一行作出判断：
如有错误(每行只有一个错误), 则按下列情况改正：
此行多一个词：把多余的词用斜线()划掉, 在该行下边横线上写出该词, 并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号(∧), 在该行下边横线上写出该加的词。
此行错一个词：在错的词下划一横线, 在该行下边横线上写出改正后的词。
注意：原行没有错的不要改。

Although all the students seem very happily at our school,  as  far as we concerned, the buildings would be more beautiful if the school could be decorated.  We students thought the school looks like a desert and the concrete walls like the grey sky in a rainy day.  We would be much happier and are able to study  better if a walls of the school could be decorated with posters,  photos and paintings,  that could certainly broaden our horizons  and enrich our lives.  Original art work are too expensive,  but unless  we buy art posters,  the cost will be low.  Using only   a little money,  it can make our school a nicer place.	1._____ 2. _____ 3. _____ 4. _____ 5. _____ 6. _____ 7. _____ 8. _____ 9. _____ 10. _____
1. happily-happy  2. we后面加are 3. thought-think 4. in-on 5. 去掉are 6.  a-the 7. that-which   8. work -works 9. unless-if  10. it-we
Wait till you are more ______.It"s better to be sure than sorry.
[     ]
A. inspired B. satisfied C. calm D. certain
John once worked in a remote mountain village school, which is ____only on foot.
A. acceptable           B. accessible         C. available         D. appropriate
Don"t be too ________ about things you are not supposed to know.
[     ]
A. strange    B. amusing   C. curious    D. conscious
The ________ look on her face suggested that she ________ it.
[     ]
A. puzzling; hadn"t expected B. puzzled; hadn"t expected C. puzzling; wouldn"t expect D. puzzled; shouldn"t expect
Every ________ space on the wall was covered with graffiti(涂鸦), so it didn"t look beautiful.
[     ]
A. available   B. valuable   C. stable    D. comfortable