如何使用 "whereat" 造句

1. I know the things whereat you are displeased .
我想你对这些都是知道的。
2. I know the reason whereat you are displeased .
我知道你对甚不高兴。
3. Your husband was whereat the time ?
你丈夫当时在哪?
4. This is a statement whereat the listeners may get angry .
这是一个听众为何发怒的声明。
5. They will tell you many things which you have never known and whereat you will be amazed .
他们会告诉你许多你闻所未闻、使你拍案称奇的事情。