18. Leia o trecho abaixo e assinale a alternativa correta:
...
Leia o trecho abaixo e assinale a alternativa correta:
"Even though they had arrived _______ time for the concert, the organizers informed them that the performance would begin _______ a few minutes. It was scheduled to take place _______ the main stage, which was located _______ the center of the venue."
a) on - at - in - at
b) in - at - on - at
c) at - on - at - in
d) at - in - on - on
e) by - on - at - in
