单项选择题
Questions 16 to 20 are based on the following talk.
A. 14,000. B. 46,000. C. 50,000. D. 56,000.
A. Quite lonely. B. Very safe. C. Not very convenient. D. Not particularly dangerous.
A. $ 60. 5 a barrel. B. $ 61 a barrel. C. $ 61.32 a barrel. D. $ 61.67 a barrel.