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?