YOU may like chewing gum (口香糖) after meals to stop your breath smelling bad; or your mother might use a special neutralizer (调理剂) to protect her permed hair (烫发). But have you thought about the chemical principles behind such everyday actions?
On March 2, the Senior 3 students from the IB (International Baccalaureate, 国际文凭) classes at Beijing Huijia Private School presented their discoveries, all in fluent English. This kind of seminar is held every year to show the achievements of the IB chemistry experiment lessons offered by the school. IB is a qualification based on a common curriculum (课程) for students aged 16-18 in any country and is recognized by universities everywhere.
"Once I saw an advertisement for xylitol (木糖醇) gum," recalled Zhang Xinju. "Suddenly an idea came to my mind: are there any chemical reactions when the xylitol is working on our teeth?"
Zhang and his partner Bu Xuan visited several hospitals to try and find out. "Doctors know that xylitol can protect teeth, but few could explain how the chemical reactions happen," said the 17-year-old boy.
Presenting the results of their research in English to an audience of Chinese and foreign judges was never a problem for the students.
"Textbooks for IB students are in English, and our teachers speak in English," explained Wei Duan and Han Yu, whose research topic was "The Acid-Base Reaction (酸碱反应) in the process of Hair-Perming".
"In Senior 1 we often referred to Chinese textbooks, but we found we could understand and express it all in English by the second year."
Lu Jiang, the school's IB chemistry teacher and China's only IB vice-examiner, is proud that her students can apply scientific theories they learn in class to daily life.
"You might have learned these facts from you kindergarten teachers, but few think about the theories behind them," Lu said. "This kind of practice is intended to develop the scientific thinking they will need in their future studies."
1.IB is recognized by____________.
A.Beijing Huijia Private School
B.univercities in China
C.schools in Engkish-speaking countries
D.universities in any country
2.which statement is true?____________
A.Doctors don’t know that xylitol can protect teeth
B.Doctors can explain how the chemical reactions happen
C.Few could explain how the chemical reactions happen.
D.The foreign doctors can explain how the chemical reactions happen
3.Textbooks for IB students are in___________
A.Chinese B.English
C.English and Chinese D.Japanese
4.From the passage,we know_______
A.the students are creative
B.the students are poor in Chinese
C.the students don’t like chewing gum
D.The students are hard-working
5.From the passage,we can infer _________________________
A.we only need to work hard in our study
B.we must learn English well
C.we should intend to develop the scientific thinking in our studies
D.we should have more time to play
书面表达
假设你是Lily，你的朋友Alice写信给你，诉说了她的问题，请你根据以下情况，给她写一封回信。
1．父母把她当小孩看待；
2．父母对她要求严格，不准上网聊天等；
3．父母不满意她的成绩。
注意：
1．词数100左右；
2．可以适当增加细节，以使行文连贯；
3．信的开头和结尾已写好，不计入总词数。
Dear Alice,
I know exactly how you feel !
___________________________________________________________________________________
___________________________________________________________________________________
___________________________________________________________________________________
___________________________________________________________________________________
___________________________________________________________________________________
___________________________________________________________________________________
Yours,
Lily
短文改错
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意： 1．每处错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分。
I often felt so busy on weekdays. Besides for my regular school hours, I still hope to spare some time to do that I like. Therefore, the fact is that I spend most of my time doing assignments and few time is left for me to surf the Internet or listen to music. To be frankly, I really hope I can have some time watch Korean TV plays or play computer games. I am sure I can keep a balance between work and relaxation because my mother always gives me useful suggestion. She makes me aware that time is life. Once losing, it can’t be regained. So I will treasure my time and make good use of them.
阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
I love my mother best. She is average in 1. (high). She has long silky hair, and she always carries a broad smile with her. I am always 2. (thank) to my mother. In the middle of her busy schedule at work, my mother makes sure that our house 3. (organize) well at all times. Like a busy bee, she prepares our meals, washes our clothes, and manages all other housework in perfect order.
4. my mother is very busy with her work, she squeezes her precious time to help me with my school work and attend outdoor activities with me. We both enjoy the time 5. we share my happiness and sorrow.
Last weekend, I joined my mother and her friends on a beach. Besides 6. (admire) the amazing sea snails, fish and catfish, we 7. (take) part in an interesting activity on the island—bicycle ride. We rented bicycles and enjoyed the ride up and down the hill. By the time we reached the top of the hill, I was 8. (extreme) tired. I was deeply touched that exhausted as my mother was, she helped me control my bicycle steadily 9. (make) sure I got down the hill safely.
Mother’s Day is just round the corner. I will make my mother 10. card. It is high time that I showed my thanks and love to my wonderful mother.
完形填空
阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。
My wife Andrea and I picked a great time to move to New York City just a few days before the super storm Sandy hit the place.
Although Sandy _________ my family to stay indoors for two days while the wind and rubbish swirled through my new neighborhood, it _________ some unusual opportunities for us to meet our _________ by serving them. Before the storm _________ , my family went for a walk. We knew we’d be closed up for a while. We should enjoy some _________ time while we could.
While we were walking we noticed a woman _________ a huge load of emergency supplies, _________ moving from the market to her _________ . She had three large piles of supplies. Each time she’d _________ 15 or 20 feet with a pile, set it down, then go back and get another.
The _________ was going to hit before she got all of her supplies up to her living place. _________ we were already set, we figured it would be a good _________ to get to know a neighbor.
So Andrea and I each _________ a pile of supplies and helped the woman get _________ home. We had a good time getting familiar with her. She was from the Caribbean. Andrea and I loved _________ her thick, rich accent. When the storm hit later that night, we felt a little less _________ because we had a friend just a few buildings _________ . After Sandy there were dozens of_________ of selfless acts of service on TV, as people helped friends, neighbors and strangers in need.
_________ others when you are in need of service yourself is a sign of greatness. As Luther King Jr. said, “Everybody can be _________ , because anybody can serve.”
1.A. invited B. expected C. forced D. ordered
2.A. missed B. awarded C. provided D. wasted
3.A. parents B. neighbors C. relatives D. customers
4.A. increased B. reduced C. disappeared D. hit
5.A. outside B. lost C. useless D. local
6.A. struggling with B. fighting for C. watching out D. turning to
7.A. quickly B. slowly C. hardly D. easily
8.A. office B. garage C. apartment D. village
9.A. drive B. run C. cycle D. walk
10.A. earthquake B. price C. car D. storm
11.A. Unless B. Since C. Until D. If
12.A. chance B. goal C. excuse D. experience
13.A. left B. lifted C. noticed D. bought
14.A. everything B. something C. nothing D. anything
15.A. dealing with B. listening to C. laughing at D. commenting on
16.A. busy B. excited C. friendly D. lonely
17.A. here B. before C. away D. inside
18.A. reports B. notes C. results D. causes
19.A. Refusing B. Advising C. Requesting D. Serving
20.A. upset B. successful C. great D. grateful
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。
Easy Ways to Boost Your Confidence
Imagine being able to overcome any obstacle that might come your way at work or in relationships. Then try to picture yourself not having to ask for advice or someone’s approval every step of the way. 1. If you are low on confidence, read on because here are four easy ways to boost your confidence. Once you master them, everything in your life will change for the better.
Boost your self-image. If failure is getting you down, just remember that there is always a solution. 2. The best way to boost your self-image after a setback（挫折）is to write down all your accomplishments and star qualities. Make a list and put it ion your computer desktop or near where you spend most of your time. You can also make a list of all the things you should be grateful for.
3. You know your talents and strengths first. Then set your goals to match these. Reject those that are just beyoud your skills, abilities, qualifications or experience. This is where you can realistically assess your weaknesses and build on your strengths.
Get on the positive thoughts track. Nothing can be done without hope and confidence. 4. Negative thinking may be useful when imagining failure situations, threats, and obstacles. But once you are trapped in negative thoughts, your brain ignores everything else and you only think of failure. The best solution is to build on positive thoughts.
Know being confident is an ongoing process. 5. Keep playing to the best of your ability and your confidence will always be there to support you.
A. Set realistic goals.
B. Stop playing different roles.
C. It isn’t a goal that you reach and then stop.
D. Why not keep comparing yourself with others ?
E. This is what self-confident people do every day.
F. So why are they positive thoughts and not negative ones ?
G. You may have to try again so you should boost your self-image immediately.
