15. At that time, he was only a boy of sixteen.

　　 A： sixteen-years-old boy　　 B： boy of sixteen years

　　 C： sixteen-year-old boy　　 D： boy of about sixteen

　　　 (　　 )

14. It's good to see all my teachers and friends again.

　　 A： nice　　 B： happy　　　 C： well　　　　 D： fine

　　 (　　 )

13. We have friends all over the world.

　　 A： through　 B： together　 C： throughout　 D： outside

　　 (　　 )

12. What's wrong with you?

　　 A： bad　　 B： ill　　 C： the matter　 D： the mistake

　　 (　　 )

11. Excuse me, can you tell me the way to the Summer Palace?

　　 A： say　　 B： show　　 C： talk　　　　 D： give

　　 (　　 )

10. fewer than many but more than two---(　　　　 )

9. be afraid of ---(　　　　　 )

8. at once---(　　　　　　　　 )

7. not dirty---(　　　　　　　 )

6. very good---(　　　　　　　 )