You can see nothing else when you look in my face, I will look you in... - Charada e Resposta

You can see nothing else when you look in my face,
I will look you in the eye and I will never lie.
What am I?

#Inglês

Essa charada está presente nos seguintes PDFs para baixar:

You can see nothing else when you look in my face, I will look you in... Charada