阅读短文，根据其内容回答问题。

     "If I had one million yuan, I would buy you a palace! Do I have one million yuan? No, I don't! So I only

  can spend ten fen on this short message, sending you my best wishes!"

     Today, SMS-Short Message Service is popular, and China Mobile says that every second, there are

 410 messages being sent.

     Look around you! People are watching their mobiles, smiling or laughing. Thumbs are moving quickly

 on mobiles, bringing happiness to their friends. Through SMS, we know the weather report, share jokes

 and news, express love and friendship.

     SMS is becoming more and more popular. It is reported that 67% of young people like to send short

 messages to greet each other. Internet SMS will be more helpful to people. I am thankful for the progress

  because SMS saves me much money. Just on the top end of a thumb, so much joy can be found!

1. Is SMS-Short Message Service very popular in China?

    __________________________________

2. How much does one short message cost according to the passage?

    __________________________________

3. Which finger plays the most important role (角色) when sending short messages on mobiles?

    __________________________________

4. Who like SMS better, the young or the old?

    __________________________________

5. The passage is mainly about ______.