Mark was 11 and often went fishing with his father．Several hours before the bass（巴斯鱼） season opened，he and his father were fishing early in the evening．One hour later，he found he caught a big fish，but it was a bass．
It was 10 pm--two hours before the season opened．His father looked at the fish，and then at the boy．
"You will have to put it back，son，" he said．
"Dad ! "cried the boy．
"There will be other fish，"said his father．
"Not as big as this one，" cried the boy．
Mark looked around the lake．No others were around．Nobody would know what time he caught the fish，but he knew his father wouldn't change his idea．He slowly put the fish into the water．He thought that he would never again see such ~ great fish．
That was 34 years ago．Today，Mark is a successful man．And he was right．He has never again caught such a big fish．But he does see that same fish again and again--every time he faces a question of ethics（道德准则）．
As his father taught him，ethics are simple matters of right and wrong．But the practice of ethics is difficult．Do we do right when no one is looking? We would if we were taught to put the fish back when we were young．
根据短文内容，选择最佳答案。
1． ________ ，Mark and his father were fishing．
A．When the bass season opened
B．A few hours before the bass season opened
C．After the bass season opened
D．As soon as the bass season opened
2．What did Mark catch one hour later?
A．A small fish． B．Nothing．
C．A small bass． D．A big bass．
3．Did Mark agree when his father asked him to put the fish back?
A．Yes，he did as his father said quickly．
B．Yes，he had the same idea as his father did at first．
C．No，he thought his father would change his idea．
D．No，but he let the fish go at last．
4．Mark has never again caught such a big fish，________
A．and he never meets a question of ethics，either
B．but he meets a question of ethics from time to time
C．and he never meets fish problems，either
D．but he solves all the problems of ethics
5．According to the passage，which is WRONG?
A．Mark's father thought ethics are simple matters of right and wrong．
B．It is difficult to do right when nobody is looking．
C．It is easy for everyone to practise ethics．
D．A successful man also faces a question of ethics．