--Could you show me the way to No.5 Middle School?

问题描述:

--Could you show me the way to No.5 Middle School?
--I'm affraid I couldn't.I___never___there.
选项:A.do...go B.did...go C.have...been D.had...been
Mr.Black was surprised,"I___I lost my wallet."
选项:A.know B.don't know C.knew D.had seen

1C现在完成,有never
2C从句为过去时,主句也为过去