正确答案：
B.came about
C.loose
解析：
1.
(1) take place 表示“发生、举行、举办”,一般指非偶然性事件的“发生”,即这种事件的发生一定有某种原因或事先的安排.例如：
Great changes have taken place in our hometown during the past ten years.
The Olympic Games of 2008 took place in Beijing.
take place通常指“（某事）按计划进行或按计划发生.”此外还有“举行”之意.如：
The meeting will take place next Friday.
The concert takes place next Thursday.
(2) come about 表示“发生、产生”,多指事情已经发生了,但还不知道为什么,常用于疑问句和否定句.例如：
When Mother woke up,she didn't know what had come about.
I'll never understand how it came about that you were late three times a week.
Do you know how the air accident came about?
提示：How did it come about that…./ How come?“某事情是这样发生的,怎么会发生…样的事情?”
(3) happen 作“发生、碰巧”解,常指具体事件的发生,特别指那些偶然的或未能预见的“发生”,一般用于偶然或突发性事件.例如：
A storm happened across the river in another country.
What happened to you?(一般不说：What did you happen?)
Maybe something unexpected happened.
New things are happening all around us.
2.cut loose 摆脱；割断；不受约束.
翻译：安娜最后设法摆脱了其父亲的坏的影响.