情景交际。从方框中选择适当的句子补全对话，其中有两项是多余的。
M---Michael, J---Joe
M:--Hi, Joe, 1__________________?
J: I’d love to, but I don’t know how I can. What can I do?
M: Well.2_______________________________.
J: Yes. That’s easy. Sometimes I turn off the lights without thinking.
What’s next?
M: Second, you can ride a bike .3___________________.
J: That will save money, too. What else?
M: Try to recycle paper.
J: Oh, good idea. Newspapers, magazines, mails…4_________________.
M: And at last, take a bag when you go shopping. Don’t use plastic bags.
J: OK. 5________ I will tell them.
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