31. Many students studying abroad serve as w_____ in restaurants at weekends to earn money for their schooling.

30. In Chinese history, Zhenghe made seven great v_____, reaching as far as Africa.

29. He p_____ a visit to one of his old friends when he returned to his hometown.

28. The small v_____ where I was born is no longer what it used to be.

27. They celebrated their v_____ by holding grand parades.

26. Green v_____ are good for our health.

25. His business empire was truly v_____.

24. Their hobbies are many and v______.

23. I want a life full of change and v______.

22. Do you v_____ her as a friend?