65. Johns proved his ability as a salesman by_______.
A. going into roofing business B. carrying asbestos from Italy
C. sending a trained scientist D. showing the use of asbestos gloves
66. Which is the most important character of asbestos that the author wants to show us?
A. It is like thread. B. It feels soapy.
C. It burns easily. D. It is unusually heavy.
67. The author’s main purpose in writing this passage was to _______.
A. show the need for more scientists
B. compare asbestos with other minerals
C. increase the sales of asbestos
D. present facts about asbestos
