Hola Shirley

Thank you for pointing that out. In the given context, where you're mentioning "mi horario" in the Spanish sentence, the correct completion and translation into English would be acknowledging the reference to 'my schedule'. So, a proper translation considering your note would be:

Do you have English first thing? - Well, I have to check my schedule because I don't know.

This translation now includes 'my schedule' ("mi horario"), directly addressing the part that was missing in your initial translation. If there's anything more I can help with, feel free to ask!

Saludos

Silvia