Unit6 When was it invented?SectionB (3a--Self-check)I. 单项选择：（BC 层学生必做，A 层选做或不做）( )1.----Waiter, would you please take this note to the woman in a blue dress?---______________, sir.A. That' s trueB. My pleasureC. I agreeD. With pleasure( )2. ---Mike, don' t make so much n...
