情景交际:将下列句子排列成一段完整的对话。

a. No! Sorry! We need it.Your dad and I are going to the movies later.

b. Sure. But could you clean up your room first?

c. Yes, you have to.Or no friends come over again!

d. Do I have to?

e. OK. And Mom, could I use the car to pick my friends up?

f. Mom, could I ask some friends to come over?

排列顺序为                                                

磨机粉磨仓堵塞，磨机排风机进口负压（）。