重点讲解：
1. screw up
弄糟；搞乱；毁坏；
eg. Get out. Haven't you screwed things up enough already!
滚出去。事情给你搞得还不够糟啊！
eg. Somebody had screwed up; they weren't there.
有人把事情搞砸了；他们没在那里。
2. look at
看；查看；
eg. Just look at what you've done!
看看你都做了些什么！
eg. Look at the children tearing about in the playground.
瞧那些在游戏场上奔跑的孩子们。
3. be angry at
对…生气的；感到恼火；
eg. She had been very angry at the person who stole her new bike.
她很生气有人偷走了她的新自行车。
eg. He was angry at my words.
他为我说的话生气。