帮忙讲解4道英语题 并说明为什么这样做 谢谢

帮忙讲解4道英语题 并说明为什么这样做 谢谢
1.As she _the newspaper,Granny_ asleep.
A.read,was falling B.read,fell C.was reading,was falling D.read,fell
2.——What is her name?
—— I _.
A.forget B.forgot C.had forgotten
3.Do not talk so loudly.Your father_.
A.sleeps B.is sleeping C.slept D.had slept
4.I_ my homework now.
A.finish B.finished C.have finished D.had finished
第一题 答案是A 但我不知道为什么