behaved什么意思?

His children are well-behaved,_____those of his sister’s are very naughty.
　A.and B.so C.thus D.while
请帮我分析下,

_____was your first friend_____?He was well-behaved.A.What;like B.How;like C.What; D.How;study

I was surprised at the way he behaved.It was completely out of character.
请问这里的out of 是做什么成分呢?
对于out of能给一些例句吗,谢谢~~~
请问 out of 是做形容词，还是副词呢？
好像没有回答问题哦~~

英语翻译
Today,very sad day.
Younger brother,so well-behaved,I always reply that he made a temper,heartache knife to pay.
My anger had never seen my brother,not my intention.He has done a good job,and I should not so to him.After no further possibilities to compensate for today's fault,because I chose to separate.
Our acquaintance is a painful start.This feeling this would not result,we lit it,despite knowing that one day there will be extinguished,or whether this love burn fiercely.
The outcome of pain and happy process.
Acquaintance with the network,the first meeting with the corn,in time for the autumn season,the second meeting due to peanuts,so that subsequent to his brother bought two puppies named corn (I prefer),the cheese (brother to take,and be said that Shunzui),I called one of the two peanut (my take),the another is called the fall (younger brother to take a).We all strive to leave more best memories,shared memories of the two of us,only ours.
September 14,if not that day,perhaps,perhaps we are good friends,feelings pushed us towards a different direction.We love each other,and not,more precisely speaking,I fell in love with his brother.Perhaps,he fell in love with me,yes,he later fell in love with me.He care so much about my feelings,everything for my consideration.I am sure that my brother fell in love with me,love me.But I can not control himself,can not give him complete freedom.I know I'm selfish,but things always happen after a sense of regret.Told myself next time we must respect the younger brother,he also needs its own space.However,but today,I again asked his brother,in his suspicious to him under the vexatious.
Brother,excuse me,sister is not good,you should not get angry.Back to that day,I would choose what kind of path,but also resolutely fell in love with it right I doubly love the boy?Regardless of the outcome will be the cultivation of this love?Looked like he was suffering,my heart remorse together,hate their own powerlessness,can not hate myself nonetheless scheduled fact.I am not brave.
The time will come for us to heal,but I do not know to wait for us in this process be like?More afraid of his brother's suffering,distressed,but unable to eliminate,yes,his suffering is brought me,and I,how the him away?
If only life,such as strike through,life would not be a good point?

well-behaved的反义词是什么?
如题所示

Alice’s kids are well-behaved, but ______ of her brother are impolite. A．those B．ones C．the one D．that