Answer:
see below
Explanation:
Las
because when you say "las", you are saying that Mercedes y tu compraron faldas (you and Mercedes bought skirts
From whom? And do you have any idea about what you want to said?
Answer:
El avión sale cuando está despegando - the plane leaves when it is taking off
El avión sale cuando está aterrizando - the plane leaves when it is landing
El avión sale cuando hay una demora - the plane leaves when there is a delay
El avión sale cuando los pasajeros hacen las maletas - The plane leaves when the passengers pack their bags
Explanation:
the answer is option one