阅读下面短文，把A—D四个句子填入文中空缺处(1—5)，然后完成5小题。

     Here is an interesting way to write a "secret letter". You do it with the help of watermarks. If you collect stamps, you know what a watermark is.  1    But you can not see it. You can see it only when you put the stamp in the water. The mark is called a "water- mark".  2   People make watermarks on stamps by applying pressure(使用压力). In this way, the watermark can be shown clearly because of the reflection(反射) of the light.     

It is easy to take watermarks and use them to write a "secret letter". You put a piece of paper in water, then take it out quickly and put it on a piece of glass.  3    Now you may write on the dry piece. You must use a hard pencil to apply pressure. When you raise the dry piece. 4 But the words will be seen again if you put the piece of paper in water and take it out quickly. Now, please try it and see how it works.

A. The mark shows that you have a real stamp.

B. When your wet paper becomes dry, you will not see anything.

C. On every stamp there is a mark.

D. Put a dry piece of paper on the top of it.

5. Which is the best rifle of this passage?   

A. Stamp.                          B. A Piece of Special paper

C. Water Mark                     D. Secret letter

 Want to say "hello" from Disneyland? Send a post card!

Beautiful scenes of paradise (乐园), wild animals, silly pictures — you can find them all in one place. Where? On a post card! Have people always sent post cards? No. Before post cards, people liked sealed letters.

The idea for the first decorated (装饰) post card came to John P. Charlton in 1861. He thought a simple card with decorations would be a great way to send a note. Then in the late 1800s, post cards with pictures appeared. By law, people had to write their note on the front ——on the picture! The back was only for the address. Several years later, England allowed a divided-back post card. Then people could write their note on the back left side and put the address on the right. During the early 1900s, the golden age of post cards, picture post cards became a craze of the world. In 1908, Americans alone mailed over 677 million post cards. Today, post cards are the third most popular collection in the world after stamps and coins.

1.We can see some silly pictures on the post cards.

2. Post cards were produced before sealed letters.

3.In 1861, the first decorated post card appeared.

4.Post cards were most popular during the early 1900s.

5.Stamps, coins and post cards are the most popular collections in the world.

Is your schoolbag too heavy to carry? The e-schoolbag will help you. In fact, the e-schoolbag should perhaps be called an e-textbook. It is a small computer for students. Heavy schoolbags have been a serious problem for them for a long time. But the e-schoolbag will change everything.    
It is much lighter than a usual schoolbag. Also, it is as small as a usual textbook, an exercise book and so on. They can be made into chips that are as small as a stamp. The students can read the text page by page on the “screen”, take notes, or even send e-mails to their teachers. All they have to do is to put the right chip into the e-schoolbag and press the button.
It is said that e-schoolbags have been put into use in some Chinese middle schools. In 2012, some students in Shanghai started to use e-schoolbags in the new term. Some say that e-textbooks can be easily broken. Some say it is not good to students’ eyes. But only time will tell us all.
【小题1】An e-schoolbag is _____.

SUNNY SCHOOL

We are a bilingual(双语) school for children of 6-15. We want a cook, a library assistant, a sports coach and a language teacher.

1.Who can’t go to Sunny School?

2.Who is not wanted by Sunny School?

3.The cook must be _______.

4.The Sunny School wants a teacher ________.