问题如下（要有解析）1.I asked your mother if she -------- that dress.A

问题如下（要有解析）
1.
I asked your mother if she ________ that dress.
A.bought B.had bought
C.had buyed D.buy
2.
—How long _____?
—Three years.
A.did they get married B.were they married
C.have they got married D.have they been married
3.
— I have got a headache.
— No wonder.You _____ in front of that computer too long.
A.work B.are working
C.have been working D.worked
4.
Li Ming said he _____ to Beijing the next week.
A.is going B.will go
C.would go D.went