16. "Why did you leave the meeting early?"“I found the discussion ( )."

21. When the school master is away, Mr. Johnson will be ( ) the whole school.

20. The city has decided to ( ) all the old buildings.

19. I felt thoroughly ( ) in the crowded Manhattan.

18. As ( ) as possible he opened the door and went out into the cold December night.

17. ( ), it＇s very tidy.

16. I don＇t think that your watch is ( ).

15. David may ( ) , but we must go at once.

14. As I didn＇t have any experience, I was ( ) problems.

13. The bookstore hasn＇t ordered ( ) textbooks for all the students in the course.

12. You＇ll have to pay for the holiday in ( ), I＇m afraid.