高一英语选择题
1.Thedays_____weworkedtogethercannotbeeasilyforgotten.
A.thatB.whenC.whichD.atwitch
2.Theesdays_____wespenttogethercannotbeeasilyforgotten.
A.thatB.whenC.onwhichD.atwitch
该怎样选啊?说明理由
还要这两句有什么区别?