mr smith gets a letter from a friend of his and reads it in

mr smith gets a letter from a friend of his and reads it in his study.At this time ,the head of his office calls him and he goes to answer.His son bill goes into the room .He begin to draw a monkey on the letter.When his father comes back ,he can't read it any longer .He beats the boy and lets him go out.Bill begin to watch an old man mending a bike at the turning.
“what does mr smith beat bill”asks the old man
“he’s a lawyer ”
“does he usually put other into prison”
“no,”answer the boy.“he says he can't do such foolish things”
“do you hope to be a lawyer,too”
“no,i hope to a policeman”
“for what?”
“he beats me this morning”
why does mr simith beat bill？
the word “study” in this reading means（        ）
bill goes out and plays （         ）
bill hope to be a policeman to（            ）
from the reading we know that （         ）