补全对话 从方框中选出正确的句子补全对话。
Kangkang: Hello, Michael!
Michael:  ______1_________
Kangkang: What are you doing there ?
Michael:  ______2_________
Kangkang: What’s the matter with it ?
Michael:  _____3____ I press the “ON”button but nothing happened.
Kangkang: Well, are you sure you plugged it in ?
Michael:  _____4_________
Kangkang: You’d better ask our computer teacher for help.
Michael:  _____5_________