46. A. travellers B. people C. ducks D. animals
45. A. treated B. observed C. suspected D. examined
44. A. rest B. treatment C. breath D. care
43. A. temperatures B. spirits C. crimes D. possibilities
42. A. doctors B. patients C. viruses D. dangers
41. A. contact B. relation C. connection D. communication
40. A. safety B. luggage C. health D. identity
39. A. farmers B. passengers C. adults D. clerks
38. A. common B. formal C. important D. powerful
37. A. grow B. decrease C. remain D. vary
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