16. Who will o                 the meeting? We'll have many things to do.

17. She felt u                 at the disappointing result.

18. I also a                 you to take a basic multivitamin every day.

19. Sometimes it's hard to s                 the problem by myself.

20. He always tells lies, and I don't t                 him at all.

21. Mr. Kennard is a teacher of much e                . He has taught in several countries.

22. I was late for class today. The teacher was a                 with me.

23. We call the persons who are between 13 and 19 t                .

24. I want to t                 to New York when I am free.

25. Zhang Ping is very c                . He usually makes mistakes in his exam.

26. We want to o                 a music club. Would you like to join us?

27. He didn't pass the exam, so he was u                .

28. The doctor a                 them to play computer games just for a short time when feeling tired.

29. I don't know how to s                 the difficult problem. Can you help me?

30. When you talk to your net friends, you can't t                 any strangers. Most of them don't tell you the truth.

31. If you want to make friends with him, you should                 (信任) him.

32. Sometimes he doesn't know how to                 (解决) the problem.

33. She failed her maths examination because of her                 (粗心的) studies.

34. Bob looked very                 (沮丧), because he lost the book of the library.

35. She took part in helping people in the Wenchuan Earthquake. She would never forget this unusual                 (经历).

36. He was so careless that he made a few                 (错误) in his lessons.

37. I must