Here are the answers to your questions:
Question 1:
The English word for the spoken phrase is likely city (assuming the audio phrase relates to urban areas).
Question 2:
You would most likely see an oso in el zoológico (the zoo).
Question 3:
The mode of transportation that travels on water is el barco (the boat).
Question 4:
Santo Domingo shares the island of Hispaniola with Haiti.