Read the following passage and choose the best answer A, B, C or D.
36. D. Finding and studying large green anacondas
=> phần lớn đoạn văn là đề cập tới việc tìm ra và nghiên cứu về " anacondas" của các nhà khoa học
37. A. native people
=> snakes of this size have not been found since, but native people say that they have found snakes up to 50 feet long
38. B. local disease
=> There are no roads and the place can be very dangerous. The jungles are full of dangerous animals such as poisonous tree frogs. Native people can become violent on account of misunderstadings
39. C. harmful
=> poisonouns = harmful: có hại, gây hại
40. C. It is highly unexplored.
=> The Amazon Basin is one of the least explored places on Earth