（2016•烟台）Each Friday，my son′s kindergarten（幼儿园） class has"a prize day"．All the children who do well in the week can get a prize．The children have behavior cards．The cards start out green every morning，but are changed from green to yellow，orange and finally to red if they do something wrong．Most of the children never change their cards from green．
On many Fridays，a boy named Tommy often walks out with an unsmiling face because he has had a bad day or two that week．Tommy is a naughty boy and he often causes trouble．Other children would tell their parents："Tommy got angry，"or"Tommy didn't listen to the teacher，"or"Tommy got trouble today．"But recently，things have become much better for Tommy．My son reports proudly each day．"All GREEN today"．
Last night，after I kissed him goodnight，he said he was very excited because tomorrow was a prize day．"And I hope，hope，hope that Tommy stays on green！"My heart will filled with pride．I told my son how kind it was of him to think of Tommy rather than caring about his own prize．

请根据短文内容，选择最佳选项．
46．What color is a behavior card at first？
A．Red
B．Yellow
C．Green
D．Orange
47．If a boy's card was changed into red，it showed that ．
A．be got a prise
B．he did badly
C．he helped other children
D．he became better than before．
48．The underlined word"naughty"in Paragraph 2 refers to ．
A．聪明的
B．友善的
C．内向的
D．淘气的
49．From the passage we know that ．
A．things were becoming better for Tommy
B．Tommy behaved wores and worse．
C．Tommy always listened to reachers．
D．Tommy never got a green card．
50．Why does the father take take pride in his son？
A．Because his son always cares about him．
B．Because his son always thinks of his own prize．
C．Because his son often tells him what happens at the kindergarten．
D．Because his son always thinks of Tommy rather than caring about his own prize．