A doctor entered the hospital hurriedly after being called in for an important surgery （外科手术）．

He found the boy's father in the hall waiting worriedly．

On seeing him，the father cried out，"Why did you take all this time to come？Don't you know that my son is in danger？Don't you have any sense of duty？"

The doctor smiled and said，"I am sorry．I wasn't in the hospital and I came as fast as I could after receiving the call and now，I wish you'd calm down so that I can do my work．"

"Calm down？!What if your son was in this room right now？Would you calm down？If your own son dies while waiting for a doctor，then what will you do？"said the father angrily．The doctor smiled again and replied，"We will do our best and you should also pray （祈祷）for your son's healthy life．"

The surgery took some hours after which the doctor went out happy，"Thank goodness!Your son is saved!"And without waiting for the father's reply he carried on his way running by saying，"If you have any questions，ask the nurse．"

"Couldn't he wait some minutes so that I can ask about my son's state？"shouted the father when seeing the nurse minutes after the doctor left．

The nurse answered，tears coming down her face．"His son died yesterday in a road accident．He was at the burial （葬礼） when we called him for your son's surgery．And now that he saved your son's life，he left running to finish his son's burial．"

根据材料内容选择最佳答案，并将其标号填入题前括号内．

46．What did the doctor do afterhe received the call for the surgery？ 　　

A．	He asked another doctor to do his duty．
B．	He went to the hospital as soon as possible．
C．	He discussed the boy's state with the father．
D．	He waited until his son's burial was finished．

47．The father shouted at the doctor because he thought 　　

A．	he had waited too long
B．	no one cared for his son
C．	the doctor was cold to him
D．	the surgery took a long time

48．Who told the truth to the father in the end？ 　　

A．	The doctor．
B．	The nurse．
C．	His son．
D．	A patient．

49．How might the father feel after he knew the truth？ 　　

A．	Angry．
B．	Excited．
C．	Sorry．
D．	Doubtful．

50．What is the best title for the text？ 　　

A．	Seeing is believing
B．	Time waits for no man
C．	Practice makes perfect
D．	Think before you decide．