Ustedes SON mexicanos.
answer: SON
D is the answer I guess. Thanks for the free points
The answer would be "Estoy escribiendo" because estan means they are, esta means he is, and estamos means we are, adn we are talking about something in first person and estoy means I am so this perfectly fits it
Hope this helps
1. sabes
2. the launch, mission, and landing
3. to research the earth's Ozone
A veces Is how you say "sometimes" in Spanish. Hope this helped.