Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!

   Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.

"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."

   British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.

   But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.

  Will there be a better indicator than litmus paper? The three kids decided to try and find out!

    How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.

   The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper!

"It's our first scientific journey, Huang said, "But it makes me want to try harder."

1. Whom did the three kids want to challenge?

A. Their chemistry teacher.     B. Their headmaster.

C. Robert Boyle              D. Thomas Edison

2. From the text, a red cabbage is a kind of ____.

A. plant　　B. animal　　C. paper　　D. liquid

3.What is widely used as the acid-base indicator now?

A. red cabbage              B. litmus paper

C. any plant                D. any flower 

4.The story mainly tells us ____.

A. how to make litmus paper    B. about the three kids' spirit

C. scientists were wrong        D. the kids are heroes

Cooking and Learning

In this E-book package, we have four e-books.

Fun with Food

This fun e-book is filled with

exercises --- photo tests,

word exams, riddle games,

coloring pages and exercises

on learning more about food.

1. Kids can ________ by reading Fun with Food.

A. do science experiments                   B. get cooking experience

C. cook well in the kitchen                  D. play some riddle games

2. ________ has over sixty pages.

A. Fun with Food                         B. Kids Cooking Lessons E-Book

C. Food Facts E-Book                     D. Kids Food Science Experiments

3.Kids Cooking Lessons E-Book is popular because ________.

A. there is a unit for each age group           B. there are a lot of photo tests in it

C. kids can learn more about science          D. each part is very easy to print off

Recent research from the Pew Internet Project suggests that 90% of Americans aged from 12 to 17 use the Internet, and 51% of those teens use social networks. However, there are many possible problems with social networking sites and the teenagers who use them.

    Apart from the social advantages, social networking sites can be used to record school research, develop artistic talents and experiment with other forms of subject creation. They provide a way to communicate with others who share the same interests and to get helpful advice on ongoing projects.

Along with these advantages come some dangers. For example, most social networking sites are open to all, especially MySpace, which is the most popular social network among teens in America. It means that they could be put in unpleasant and frightening situations.

A greater danger is that teens may become objects of the people with secret purposes. The secrecy of some social networking sites makes it easy for dangerous people to find young teens and invite them into dangerous conversations. It’s easy for them to pretend as teens and draw children into dangerous real-world communication as well. Then further hurt might be on its way.

Another danger is identity stealing, which can happen when teens share too much information about their names, dates of birth and locations.

    Therefore, it’s very important to make sure teens are safe when they use social networks.

    Many of the same rules that work for online chat work for these sites:

※ Don’t use your real name.

※ Don’t give out personal information to people you don’t know. A last name and a town

are enough for a bad guy to find where you are.

※ Don’t believe that people are who they say to be.

※ Immediately end any communication that makes you uncomfortable and report it to a

       parent.

Only if you are sure of your safety, can you enjoy the fun brought by social networking. Besides, trying to deal with all problems on your own can lead to terrible results. Remember, asking your parents or school officials for help doesn’t mean you are unable to do anything but wiser than many others.                                             

1.How many dangers of using social networks are mentioned in the passage?

A. 2.                 B. 3.                C. 4.                D. 5.

2.The writer takes MySpace as an example to show that ________.

A. students could be put into unreal situations on the Internet

B. teenagers are facing unknown dangers on the social networks

C. Internet provides more social websites to American teenagers

D. social networks are very popular among teenagers in America

3.We can infer from the passage that ________.

A. the dangers are similar when chatting online and surfing social networks

B. more than half American teenagers aged from 12 to 17 use social networks

根据中文或首字母写出单词，使句子完整准确。

1.What he said was already            (记录) by the police.

2.Congratulations! You’ve answered all the questions            (正确地).

3.Mr Wu received a present from his friend, but he didn’t a_____________ it..

4. The camera was one of the greatest _____________(发明)in the world.

5.You have to be p___________ enough to wait for your turn.

6.Now people eat______________ (health) than before and many of them pay much attention to doing sports after work.

7.The boy            __ (take) to hospital at once after he fell off the tree.

8.we must do what we can             (save) the girl. She is too young.

9.We hope that more charity shows            __ (hold) to raise money for Project Hope.

10. The boy considered              (he) as the smartest boy in his class.

根据短文内容及首字母提示, 补全空格内单词，请写出完整单词。

Amanda is an American filmmaker and actress. She came to China three years ago to study Performance at Beijing Film Academy. Last month, she m  51  to Japan to study Economics at the University of Tokyo. On June 10th, she r   52   to the USA. She chatted with her parents about the cultural d   53    between the two countries.

“The people in b  54   countries are very friendly to f   55 . But they have different cultures. For example, when I spoke Chinese in China, the people there always showed s  56 on their faces. But when I came to Japan, I found it was o   57   . Most local people there hoped I could talk with them in Japanese, t   58   I was not good at it,” she said.

Amanda thought this might have something to d  59  with the fact that the western group in Japan is o  60   than the one in China. They have stayed in Japan for a long time. And most of them speak Japanese well. But Westerners in China are still quite a new group. They’re usually treated as guests and tourists.

A small town named Bundanoon in Australia has decided to stop the sale of bottled water(瓶装水). They say that bottled water can cause environmental problems. Too many resources(资源) are used to make bottled water. When people finish drinking the water, the bottles will be thrown away and go into dustbins. So they require local people in the town to stop buying bottled water and use tap water to drink. Visitors are encouraged to get water from water stations in the main streets, and fill the water in bottles that can be used again. The decision has been supported(支持) by all the shopkeepers in the town. Bundanoon is the world’s first town that has got its shop selling bottled water. Probably we should follow the example. Let’s stop buying bottled water and use tap water！[来源:ZXXK]

假设你将代表初三毕业生在毕业典礼上发言，请你用英语写一篇发言稿。

要点如下：

1. 发言稿须包括所有内容要点，要求语句通顺、意思连贯；

2. 最后一个要点适当发挥1~2句；

           3. 词数80个左右，发言稿的开头已给出，不计入总词数。

Good afternoon, everyone! It is a great honour for me to make a speech on behalf of the graduating class of 2012. __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

1______ earthquake on March 11^th was ______ terrible disaster, making thousands of Japanese homeless.

A. An; a        B. The; a       C. An; the     D. The; the

1We could hear the frightened people's _____ in the accident.

A. noise      B. sound       C. shout         D. voices

1An old friend of my sister's always helps my brother and       with       English.

A. I; our             B. me; ourselves     C. I; my        D. me; our