单项选择
1.she remembered she ________ the book. a.hasn't paid for b.payed for c.hadn't paid for d.didn't pay for
1.She remembered she ________ the book. c.hadn't paid for 她记得他还没有付书的钱。“表达截止到过去某时已经完成或未完成的动作，用过去完成时态。”
答：d. how long, in 对一段时间提问用 how long in + 时间段，用一般将来时态 after +时间段 用一般过去时详情>>
