So, "Ellos" means "they"
Podemos- we can
Pudieron- could
Pueden- may
Pudo- could
If you think about it it's not "Podemos" or "Pudo"
But, i could be wrong. "Podemos" does not make any sense.
So, that means is "Pueden".
Ellos Pueden. (they may)
Your answer is PUEDEN!
:) i hoped this helped
6. they have taken the train
3. you have packed your bags
5. you have put your passport in the backpack
7. you have traveled by cruise?
8. The boy got his boarding pass
12. the inspector has written in the form
sorry it's out of order
1.tengo
2.sere
3.hablará
4.fueras o serás (not to sure for this one)
5. Puedo
6. Estudiábamos
7. Trabajas
8. Supiera
9. Tuviéramos
10. Fuera