阅读理解。 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 ____ ①ten fen on this short message, sending you my best wishes! Today SMS-Short Message Service (短信服务) is popular, and China Mobile says that every seconds, there are 410 messages being sent. Look around you!②人们看着手机，或者微笑，或者大笑。Thumbs (拇指) 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. ③SMS is becoming more and more popular. It's reported that 67% of young people like to send short messages to greet each other. Internet SMS will be more helpful to people. I'm thankful for the progress because SMS saves me much money. Just on the top of the thumb, so much joy (快乐) can be found. 1. 在①处填单词使句意完整。 So I only can _____ ten fen on this short message, sending you my best wishes! 2. 将③处句子译为汉语。 SMS is becoming more and more popular. __________________________________________________________________________ 3. 将②处译为英语。 人们看着手机，或者微笑，或者大笑。 __________________________________________________________________________ 4. What is the short form of  'Short Message Service'? __________________________________________________________________________ 5. Why is he thankful？ __________________________________________________________________________