Respuesta:
a) 1 Lucy left, 2 i arrived home
b) 1 The game started, 2 they arrived at the stadium
c) 1 The school bus arrived, 2 i was trying to finish my homework
d) 1 You cleaned your room, 2 your mother came in
e) 1 The dog ran away, 2 i closed the gate
f) 1 We became best friends, 2 the year ended
