完成对话。在对话的空格中填上适当的单词，使对话完整正确。一空一词，含缩写词。（共10小题，每小题1分；计10分）。
A：Morning, Liu Ming!
B：Morning, Wang Jun! Why are you in         a hurry?
A：I have to be at school       and finish my homework first before the class.
B：Haven’t you finished your homework yet?
A：    . Yesterday evening my father turned       all the lights and I couldn’t finish my homework.
B：Really? Why did he do that?
A：Because we joined in an         activity.
B：What was it?
A：Earth Hour. By the way, did you         to take a bus to school?
B：Yeah. But I’ve      to walk to school now. I want to do something for low-carbon economy(低碳经济), and      is also good for my health.
A：Sounds like a good idea! We should pay more attention to        the environment.
B：Yes, you are right.       walk to school together.