" in advance" is the word to be filled in the blank. But the sentence means we pay first then order, it doesn't make sense.
We don't know how much we are going to order, how much should we pay in advance?
23 de junio de 2010
0
0
¿No has encontrado las respuestas?
¡Escribe tus preguntas y deja que los hablantes nativos te ayuden!