Question
14 to 20 are based on this passage
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Question 14
The passage is primarily concerned with
A. describing the types of manmade materials that will not decompose
B. presenting the role nature plays in breaking down substances and materials
C. identifying the biodegradability of a product
D. discussing the benefits of the biodegrading process
E. showing different arguments concerning biodegradable materials
我的答案： 无