Unit6 When was it invented?SectionA (1a-2d)I. 单项选择：（BC 层学生必做，A 层选做或不做）( )1. ---So kind of you to give me a ride to the station! ----___________________.A. It doesn’t matterB. Never mindC. Thank youD. My pleasure( )2. ---Look,what an old palace ! It looks so great. ---...
