Réponse : Hello!!!
1. Paul- We will need (e) more people to explore space.
2. Jack- That's why I am going to become (a) an astronaut.
3- Paul- you will go ( I'm not really sure it's either b or d honestly) to University for many years.
Explications :
3- since its says many years ( taking about time) and will go ( prediction) that is why I am not sure so...... get lucky I guess.
I hope that this has helped you tho ♥