I"m sorry to hear that your grandma______(fall) downstairs.按适当的形式填空why?

I"m sorry to hear that your grandma______(fall) downstairs.按适当的形式填空why?
I"m sorry to hear that your grandma______(fall) downstairs.按适当的形式填空
why?

I"m sorry to hear that your grandma______(fall) downstairs.按适当的形式填空why?
I"m sorry to hear that your grandma___fell___(fall) downstairs. 按适当的形式填空

fell

falling

填 fell
用过去式 - 这事情已经发生了。

fell