根据对话内容，选择恰当的句子补全下列对话。 (H for Henry; J for Janet) H: Hi, Janet, Would you like to help save the environment? J:  I don't know. 1______ H: Well, first, you can start by turning off the lights. J:  Yes. That's easy. Sometimes I turn on the lights without thinking. 2______ H: Second, you can ride a bicycle. 3______ J:  That will save money, too. What else? H: Third, try to recycle paper. J:  Mm. We get a lot of paper at home. Good idea. H:  The fourth idea is turning off the shower when you're not using it. J:  You mean, when I have shampoo (洗发剂) in my hair? H: Yes. 4______. Every minute helps. And fifth, take a bag when you go shopping. Don't use plastic bags (塑料袋). J:  OK. 5______. I'll tell them. A. I disagree with you. B. We have to save water. C. My parents do most of the shopping. D. Don't take a bus or a taxi if you don't have to. E. What's next? F. I never do that. G. What can I do?