初中英语选择题.关于时态

题目

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;attended
B.When did;attend
C.How long did;attend
D.When have;attended
2)Father will send me a digital camera on my birthday. My traditional one _____ soon.
A.will replaced
B.has replaced
C.will be replaced
D.havs been replaced

答案

1,B(ago用于过去时）
2,C（soon用于将来时,又由于是被动语态所以因加be动词）