8、We offered him our congratulations _______ his passing the college entrance exams.

25. The boy is not happy at the new school. He has()friends there.

24. He is not seriously ill, only a()headache.

23. I’d like the teacher()classes are very interesting and creative..

22. I didn’t expect you to turn()at the meeting yesterday.

21. We worked hard and completed the task().

20. Once environmental damage(), it takes many years for the system to recover.

19. The red flower goes from one to()in the class

18. Two days is not enough for him to finish the work. He needs()day.

17. Therefore, other things()equal, the member of workers that employers want decreases.

16. It’s time we()the lecture because everybody has arrived.