在横线上填写适当的介词：
Can  you  see  some  apples_____  the  tree?
We  go  to  school______  Monday_____Friday.
Bob  is_____  duty  today.
My  mother  is  ill, I  must  look______her  at  home.
The  little  girl  is  interested_____English.
Zhao  Wei  is  famous______ an  actress.
We  start  to  have  classes_____8:20_____  the  morning.
The  teache  agrees______  the  student.
Lucy  is  afraid______  the  snake.
Jack  is  good_____  math.