1. Since the poisonous milk powder of Sanlu was exposed , the parents have been greatly concerned about what their children can eat in the future.
2. A good friend is one who can share with you happiness and sadness.
3. I am so grateful to you for your advice , which helps me get along well with my classmates.
4. It's the first time that he has communicated with pen--friends by e--mail.
5. While we were playing beside the swimming pool, that naughty boy pulled me into the water on purpose.
6. Hobbies are not tiring: the more time you put into them, the more fun you will get.
7. Computers makes it possible for people to communicate with each other face to face even if we live in different places in the world , which changes our life completely.
8. When I get stuck in a series of problems in exams, I firstly tell myself to calm down.
9. According to the news report, it is the weather condition that decides on the accurate lauching time of ShenzhouVII.
10. In order to realize his champion dream, he has suffered so much in his past 10 years.