4.He was wearing a pair of sunglasses to protect his eyes from the sun.

3.The prize will be given to those who have made great contributions to the world peace.

1There is a party tonight in honour of our new headmaster. Would you like to come?

2. Mary has just won the national English competition. Will you join us in celebration?

1. vacation　　 2. attend　　 3. lucky　　 4. August　　　 5. living

6. Besides　　 7. how　　　 8. One　　　 9. anywhere　　　 10. welcome

5. are not allowed　　 6. in brief　　　 7. of great significance　　 8. doesn’t dare to

1. every fourth year　 　2. to have heard　　 3. to escape　　 4. However

6. well-trained, sportsperson

4. are swimming, wearing no clothes　 5. has made great contributions to maintaining

1. plays, important, part/role　　　 2. side, side　　　　　 3. have been

11. origins　　 12. peacefully　 13. significance　 14. stadium　　 15. ceremony.