补全对话 阅读下面一则对话，在空白处填入适当的句子，使补全后的对话意思完整，结构合理，上下连贯。每个空白处只能填写一个句子。[有的小题可能有多个答案，请写出你最满意的那一句。（每小题2分，共8分）
A: Hi! You look unhappy. ____________________?
B: I got very bad news from the News Report. It happened in Jiangsu Province.
A: What was it?
B:A crazy man entered a kindergarten and wounded(杀伤) 31 persons, including kids and teachers.
A: ___________________. Something must be done to keep schools safer.
B: Right. ____________________ when I grow up. Police can protect them from being hurt.
A: I think that’s a good choice. __________________ if you want to be a policeman?
B: I am going to study harder and exercise every day to be stronger.
A: Oh, cool enough! I wish your dream come true.
B: Thank you.