“怪不得” 用英语怎么说？

A: Why did she shout at me? I'm in a fog.

她为啥冲我吼？真是一头雾水

B: She was scolded by our boss.

她被老板骂了。

A: No wonder!

怪不得。

Congratulations! No wonder you are so excited.

恭喜你！怪不得你这么兴奋。