阅读与回答问题

    Sixteen is a special age in the United States. There's often a special celebration for a girl's 16th birthday---a big party called Sweet-16. It is like a wedding reception(结婚晚宴) in the number of guests and gifts handed out.

    About a month before the party, the girl's family sends out invitations to the guests. They must buy a special present for the birthday girl and the girl guests find good dresses to wear. A sweet-16 present usually costs $40 to $60. This is about $20 more than the usual-cost of a birthday present.

    The party itself is not held at someone's house. The hostess rents(租赁) a reception hall for the event. Food, cake and a DJ are provided. Around 6'clock, guests arrive and meet the birthday girl. Then the girl and her father have a special father-daughter dance. After that, guests dance for about 30 to 45 minutes.

    Then there is the most important part of the Sweet-16 party, the candle-lighting ceremony.

    The sweet-16 hostess stands behind 16 unlit(未点燃的) candles and dedicates(献给) each candle to her friends, family, and anything that she feels is important to her. A lot of crying and hugging goes on at this time.

    Afterwards, people sit and eat. Most guests begin leaving around 11 o'clock.

    This school year, I have been to two Sweet-16s. I am one of the youngest students in my grade (My birthday is in December). I'll have to wait another year before I can have my own special Sweet-16 party. I can't wait for it!

①自觉承担历史责任                                           ②克服冷漠情绪和看客心理

③伸张正义，将主要精力用于揭露社会问题   ④明辨是非，自觉抵制某些不良社会风气

下列物质的转化在给定条件下能实现的是（   ）

①NaAlO₂（aq） $\stackrel{C{O}_2}{\to }$ Al（OH）₃ $\stackrel{\Delta }{\to }$ Al₂O₃（熔融） $\stackrel{电解}{\to }$ Al $\underset{高温}{\overset{F{e}_2{O}_3}{\to }}$ Fe

②S $\stackrel{O_2/点燃}{\to }$ SO₃ $\stackrel{H_{2}O}{\to }$ H₂SO₄

③Cu（OH）₂CO₃ $\stackrel{盐酸}{\to }$ CuCl₂（aq） $\stackrel{电解}{\to }$ Cu

④Fe₂O₃ $\stackrel{HCl\left(aq\right)}{\to }$ FeCl₃ $\stackrel{\Delta }{\to }$ 无水FeCl₃

⑤饱和NaCl（aq） $\stackrel{N{H}_{3、}C{O}_2}{\to }$ NaHCO₃ $\stackrel{\Delta }{\to }$ Na₂CO₃．

根据短文理解，回答下列问题。

    The Internet is becoming more and more important in our life. How much do you know about it? What is the Internet? The Internet is a large, worldwide collection of computer networks. A network is a small group of computers put together. The Internet is many different networks from (A)                 the world. These networks are called the Internet. Once you have learned to use the Internet, you can have a lot of interest in the World Wide Web.

    What is the World Wide Web?

    The World Wide Web has been the most popular development of the Internet. The Web is like a big electronic book with millions of pages. These pages are called homepages. You can find information about almost anything in the world on these pages. For example, (B) you can use the Internet instead of a library to find information for your homework. You can also find information about your favourite sports or film stars, talk to your friends or even do some shopping on the Internet. Most pages have words, pictures and even sound or music.

    What is e-mail? (C)电子邮件是给别人发送信息的一种方法。 It's much quicker and cheaper than sending a letter. If you want to send e-mails, you must have an e-mail address. This address must have letters and dots(点 ) and an ‘@’( meaning ‘at'). This is what an address looks like: Emily @ star. net. Write a message, type in the person's e-mail address, and then send the message on the Internet. People don't need to use stamps, envelopes or go to the post office since the invention of the Internet. Quick. easy and interesting--that's the Internet!