单项选择题
A、 bought last week B、 he bought week C、 which he bought it last week D、 he bought last week
A．At 6:00 a.m. B．At 6:00 p.m. C．At 6:30 a.m. D．At 6:30 p.m.
A．About 6. B．About 8. C．About 7. D．About 12.