Unit 12 Life is full of the unexpected.SectionA (3a-4c)I. 单项选择：（BC 层学生必做，A 层选做或不做）( )1.---Was your mother at home when you went back to get your bag? ---No, she _________ to work.A. has goneB. had goneC. wentD. was going( )2. ---Were you late for the school? ---Yes....
