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day 每天 13. walk to , drive to ,fly to 14. I’ m not sure 我不敢确信 15. about= around 大约 16. 10 kilometers away from 十公里远 17. good exercise 好的锻炼 18. walk to school 步行去学 19. e true 实现 20. drive his car to

5. Friends should share happiness and sorrow ______ each other. 6. Don’t worry, I’ll explain everything _____ you. 7. Wear a hat to protect yourself _______ the sun. to of from for with to from 8.

re information than a picture sign D. a word sign and a picture sign have the same information 3. What does the underlined word “bination” mean? A. 分开 B. 结合 C. 并列 D. 平行 4. What is the disadvantage

advances in biogeic engineering. On a broader scale, one thinks of man39。 s success in harnessing new forms of energy from steam power through oil to nuclear power. Yet, nature has often hit back in