5．除去鸡蛋白胶体中混有的少量Cl^-的最简单方法是　　　　　　　　　 (　 )

A.加入少量硝酸银溶液　 　B.加热　　　　 　　　C.电泳　　　 　　　D.渗析

4．下列盛放物质的方法：①把汽油放在带橡皮塞的玻璃试剂中 ②把氢氧化钠溶液放在带橡皮塞的试剂瓶中 ③把硝酸放在棕色的玻璃试剂瓶中　 ④把氢氟酸放在无色透明的玻璃试剂瓶中 ⑤把白磷放在水中，其中正确的是　 (　　 )

A．①②③④⑤ B．②③⑤　　 C．①④ D．①②③

3．现有三组溶液：①汽油和氯化钠溶液　 ②39%的乙醇溶液 　⑧氯化钠和单质溴的水溶液，分离以上各混合液的正确方法依次是　　　　　　　　　　　　　　　　　　 (　　 )

A．分液、萃取、蒸馏　　 B．萃取、蒸馏、分液

C．分液、蒸馏、萃取　　 D．蒸馏、萃取、分液

2．下列说法中正确的是　　　　　　　　　　　　　　　　 (　　 )　

A.非金属氧化物一定能与碱发生反应

B.金属氧化物一定不能与碱发生反应

C.酸性氧化物一定能与水反应生成酸

D.酸性氧化物可能与酸发生反应

1．将下列各组物质按酸、碱、盐顺序排列，正确的是：　　　　　　 　　　　　(　　 )　

A．硫酸、纯碱、石灰石　　　　　　　　　 B．醋酸、酒精、醋酸钠

C．亚硫酸、熟石灰、小苏打　　　　　　　 D．石炭酸、熟石灰、明矾

根据教育部通知，从2007年9月1日起，中小学生每天要跳校园集体舞。通知发出后，在社会上引起了热烈的讨论。假如你是李华，请根据下表提供的内容给“China Daily”编辑写一封信反映讨论情况，并提出自己的看法和理由。

注意：(1)字数：150 (2)开头已给出，不计入总词数。(3)参考词汇：集体舞：group dancing

社交能力:sociability

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Passage A(Reading)

English is a language with many ____________ rules. Before the middle of the 5th ____________, people in __________ all spoke Celtic. Then three Germanic tribes from the European mainland and the Vikings from the Scandinavian countries invaded Britain. They ________ what we now call Old English. As a result, many pairs of words and phrases have ___________ meanings in English. After the Normans conquered England, French was spoken in this country together with English, which ___________ in even more pairs of similar words.

_________ English included many Latin and Greek words. ___________ also underwent huge changes. It is certain that this _________ will continue, and people will keep ___________ new words and new ways to say things.

2、Passage B(Project)

The Chinese language _________from many Western languages in that it uses _________which have meanings and can stand ________as words. Chinese people invented numerous characters to _________ideas, objects or actions. There is a ________that says that a man named Cang Jie invented Chinese writing. Some characters have been _________and others have been developed from _________into _________forms. The pictograph for a mountain was ________three peaks together. This became one peak and three lines and ___________turned into the character used today.

What you have read is a typical history article. When you are reading a history article, you will notice dates and years in the text, e.g., the 5^th century,1066. Identifying these details will help you understand a sequence of events and how pieces of information relate to the rest of the text. Next time when you read a history article, it is a good idea to make a time chart, listing relevant information such as times, places and events, etc. in the article. For a sample time chart, look at P58 of this book. You can certainly create a different type of time chart, for example, a table. Just make sure that it helps you understand the text.　

1).Do you have any idea ___ is actually going on in the classroom?

　 A. that　　 B. what　　 　　C. as　 　D. which

2).Mary wrote an article on __the team had failed to win the game.

　 A. why　 　B. where　 　C. what　 　D. which

3).I’d like to work with ____ is honest and easy to get on with.

　 A. who　 　B. whoever　 　　C. whomever　　 　 D. no matter who

4).It is uncertain ______ the experiment is worth doing .

　 A. where　 　B. that　 　C. whether　 　　D. how

5).As the day was fine ，I made the suggestion _______ for　 a walk in the park .

　 A. we go 　　B. we will go　 　　C. should we go　 　D. that we go

6).I don’t doubt _____ he will come.

　 A. that　 　B. if　 　C. what　 　　D. whether

7).What a pity ______is ________ you didn’t arrive by daylight.

　 A.there, because　 　　B. it, that　 　C. it, when　 　D. that ,for

8).It depends on _______ we have enough time.

　 A. that　 　　　B. if　 C. whether　 D. if or not

9).I believe ______ you have done your best and _____ things will improve .

　 A. that.\　 　　　B.\.\　 　　C. what, that　 　　D. \.that

10).It worried her a bit _____ her hair was turning grey .

　 A. while　 　　B. that　 　　C. if　 　　D. for

11.Suddenly the thought came to me ______ he could go behind .

　 A. what　 　B. which　 　C. that　 　　D. where

12).________ he is always studying hard is well known ____ us all.

　 A. How, to　 　　B. What, to　 　　C. That, to　 　　D. Whether, by

13).It is true ______ he said is of great importance to us all

　 A. what　 　　B. that　 　　C. that what 　　D. what that

14).我们不能确定他是否能够成功.

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15).真奇怪，他竟没有看出自己的缺点.

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16).我们听到了我们队获胜这个好消息.

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17).我对他告诉我的这个消息很感兴趣.

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18).那就是你错的地方。

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