Airplanes (am, is, are, am not, isn't, aren't) slow. They (am, is, are, am not, isn't,...

Question

Airplanes (am, is, are, am not, isn't, aren't) slow. They (am, is, are, am not, isn't, aren't) fast.

Answer 1

Airplanes aren't slow. They are fast

Answer 2

Airplanes aren't slow. They are fast.