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【单选题】As you know, 'being green' means that you care about the environment (环境) and that you do what you can to help the Earth. Recycling (回收利用) paper and cans, reducing waste, and protecting wildlife are a...
A.
persuade the reader to waste less
B.
explain the meaning of the word 'green'
C.
encourage people to buy this issue
D.
call on people to protect the environment