What are looking at?

What are looking at? 你在看什么 what are you looking?还是what are you looking at? what are you looking at 和 what are you looking for?有什么区别?是不是 what are you looking 后面为啥一定要接at呢?单what are you looking what you are looking at is my homework What we are looking What are you____?请问是选择“looking at”还是“looking to”? 是What on earth are they looking at?还是What on earth they are what are they looking at a dog 为什么用look at What are you looking,Jim? -What are you looking for what are looking forward to ..