在下面对话的空白处填入适当的话语（话语可以是句子、短语或词） 使对话完整。
（共10分，每小题2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: _______
这部纪录片有助于我们近距离观察美国的学校生活．
This documentary helps us the school life in America．
You can't imagine what difficulty I had （express） myself clearly at the beginning．
The engineer （try） every possible way，but still cannot get the computer started．
Hi，Judy．Have you graduated from college？
Yes．I （study）in Nanjing University for four years．
根据句意用括号内所给词的适当形式填空．
As soon as he （offer） a well paid job，he called his parents to tell them the good news．