根据句意，用所给词的适当形式填空：
The _______ (postman) wives donated a lot of money to the children in need.
I found my father still ___________ (wake) when I entered his room at 11 last night.
The room is too dirty. It requires __________(clean) every day.
From the __________(happy) on his face, we know that he failed the exam.
A 5-year-old child is sure to have difficulty __________(explain) such hard problems.
Do you think _________(achieve) the balance between study and play is possible?
At present not only the students but also their teacher _____(ask) to come to school on time.
How __________ (sad) she was telling me that he lost another bike!
—Kate, didn’t you hear the loud knock at the door?
— Sorry, I _____________( chat ) with my e-friend.
The book isn’t mine .It belongs to ______  (she)