首字母填空

首字母填空
I am a_ I canot go with you.
Are you s_ you donot mind?
I will be b_ in five minute.
There are enough s_ in the reading room.
It's nice to see you a_.
When the teacher came in,all the students stopped t_.
I'll s_ the floor and you can lean the windows.
She often helps her mother do some s_.
Help!遇难题!