A．Separating different types of garbage.
B．Disposing of trash properly.
C．Having a family clean-up party.
D．Not wasting paper.

A.Separating
B.
B．Disposing
C.
C．Having
D.
D．Not

【参考答案】

B
解析：该题的问题与对话中的What else?相对应，对话中年轻女士对这一问题的回答you should k......

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