根据句意及首字母或汉语提示完成句子。 1. T _____ the problem was very difficult, they didn't give up and succeeded in the end. 2. It's very important to get e _____ sleep every day to keep healthy. 3. Tom moved to China in 2006. He has found many differences b _____ Chinese and American. 4. The old photo often r _____ me of my childhood an my playmates. 5. —What's the matter with Gina? —She's s _____ out. 6. Don't  f _____ the animals when you are in the zoo. It's not good for the animals. 7. Could you please give me some  a _____ on how to learn English well? 8. The heavy earthquake h _____ in Wenchuan on May 12th 2008. 9. When Zhou Jielun appeared on the state, the f _____ of his all stood up and clapped their hands. 10. S _____ is the best season of a year. When it comes, the trees turns green.