alert, smart, and quick to react
alerta, inteligente y rápido para reaccionar (alerta, inteligente y rapido para reaccionar)
"You need to be on the ball to handle this job."
"Tienes que estar alerta para manejar este trabajo." (tienes ke estar alerta para manejar este trabajo)
someone or something that brings happiness
to be informed about something
to be cheerful and confident
a fundamental change in approach or underlying assumptions
to be the first to report an important piece of news
a small part of a larger situation or problem