表达惊讶

-Wow!

-Really?

-I can’t believe it.

-Unbelievable!

-I have no idea.

-Shut up!

（这里不是让对方闭嘴，而是表达惊讶的情绪。）

-Are you crazy?

-Are you out of your mind?

-That’s crazy!

-You can’t be serious.

-You are kidding.

- Are you kidding (me)?