What words are missing?

1) I want to be a scientist! - That’s good of you. But what are you going to explore? 2) I’d like to go to the mountains early in the morning and to see the moment when the Sun rises. 3) You know, he’s so curious! He wants to know everything! 4) This long road separates two fields. 5) They don’t have their national language. They speak French or German.