19. The of.....earthquakes occur around the Pacific Rim. (major) 20. Floods and Earthquakes are.... disasters. (nature) 21. It's difficult to give a speech without... (prepare) 22. In America, hurricanes are.... storms that reach 120 kilometers per hour. (tropic) 23. He is an ...... doctor. He has saved a lot of people. (experience) 24. The hurricane swept in..... without any warning. (abrupt) 25. This man.....escaped from a volcanic eruption last week. (lucky) 26. The terrible... of the storm made thousands of people homeless. (destroy) 27. The story about UFOs caught the....of the whole class. (imagine) 28. She has many... projects. (science) 29. Imagine that someday you would live without.... (electric) 30. Many reports in newspapers mentioned a lot about the..... of UFOs. (appear) 31. They said that UFOs existed only in films for..... (entertain) 32. The.... trip makes us happier and healthier. (excite) 33. What an.... record our players set! (amuse) 34. The baby fell.....when watching a boring film. (sleep) 35. Those pollutants have... the lives of many seabirds in the past few years. (danger) 36. In..... to air pollution, big cities are faced with overcrowding. (add) 37. Do you believe in the ... of God? (exist) 38. People are talking about the .... circles on the fields in Great Britain. (mystery) 39. The car ran....and crashed. (speed) 40. Gas and petrol are... sources of energy while solar and windy energy are.... ones. (new) Giúp mình với cảm on ạ