初中英语选择题.关于时态

初中英语选择题.关于时态选什么不重要,最重要告诉我为什么.详细点哦思路.谢了1)— ______ you _____ Professor Lee's lecture? — Two days ago.A.How long have;attendedB.When did;attendC.How long did;attendD.When have;attended2)Father will send me a digital camera on my birthday. My traditional one _____ soon.A.will replacedB.has replacedC.will be replacedD.havs been replaced