问题
选择题
Plastic bags and boxes________ "white pollution" are attracting more and more people's attention. [ ]
A. are known as
B. are known for
C. known as
D. known for
答案
答案：C
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Plastic bags and boxes________ "white pollution" are attracting more and more people's attention. [ ]
A. are known as
B. are known for
C. known as
D. known for
答案：C