人们对于学生网上交友持不同意见。请你用英语写一篇关于学生网上交友的短文，介绍人们的不同观点，并表达自己的看法。

注意：

1.文章必须包括表中的全部内容。?

2.词数为100左右。?

3.参考词汇：网络朋友on-line friend(s)，上当受骗to be cheated

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假如你是李华，将于7月26日到北大附中参加英语国际夏令营。请你根据以下提示，写一篇关于英语学习的英文发言稿。

注意：

　 1．可根据内容要点适当发挥， 但不要逐条翻译；

　 2．词数100左右；发言稿的开头与结尾已经给出，不计入总词数。

Good morning everyone,

　 In today's world, being able to master a foreign language will be helpful in our life．Here I'd like to share with you my opinions about English learning．

　 Thank you!

书面表达

　　请你根据以下提示写一篇关于我国手机拥有量变化的报道，并阐述手机给人们生活所带来的利与弊．

　　1．方便；

　　2．随时、随地联系；

　　3．许多功能满足不同要求，如发短信、上网等；

　　4．接到打错的电话并为之付费；

　　5．电磁辐射 (radiation) 有害健康．

　　注意：①词数100左右；

　　　　　②开头已为你写好．

　　As can be seen by every one, great changes have been taking place in the

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　　Take a guess. How much do you think an eight-side, red-brown stamp is worth? Well, it was sold by the Robert A. Siegel Galleries in New York City for $ 280,000!

　　The stamp is an 1856 one-cent British Guiana. It pictures an old sailing ship with words in Latin above and below it. You may think the stamp looks rather dull. But it is the only one of its kind in the world.

　　Any stamp collector would like to own the one-cent British Guiana. But you don't have to aim for value in a stamp collection. You may collect bright new stamps that cost very little. The idea is to pick a topic that interests you and then collect every stamp you can find that pictures it in some way. For years a Pennsylvania man looked for stamps showing roofs. Why? Well, the collector's name was John C. Ruhf.

　　President Roosevelt always found time to spend with his stamps. After his death, they were sold for over $ 25,000. No one will even try to put a value on the world's greatest collections. They are those of the British Museum, the U.S. Post Office and the British Royal Family. It is said that the Royal Family owns every stamp ever put out by Great Britain since 1840. No, that's not quite right. There's one stamp missing.

　　Stamp collecting has been a hobby for over 100 years. Going for topical（关于某个主题的）stamps is a good way to appreciate its pleasure.

(1) Why did Mr.Ruhf select the topic of roofs for his collection of stamp?

[　　]

A．He wanted to meet one of the rare stamps some day.

B．He liked the stamps that agreed with his last name in pronunciation.

C．He had collected the stamps showing roofs for years.

D．He liked different kinds of roofs more than any other stamps.

(2) The sentence “… and then collect every stamp you can find that pictures it in some way.”means ________

[　　]

A．after collecting such stamps you can find them different

B．(and) you may use different methods to collect such stamps

C．then collect as many stamps as you can

D．try to collect such a kind of stamps designed in different ways

(3) In this passage, the writer really means that

[　　]

A．picking an interesting topic of the collection is quite a good idea

B．it is no good for collectors completing the sets of the same stamps

C．people have had the hobby of collecting stamps for years

D．it's a good way to collect stamps having something to do with one's name