选词填空
pilot future professor world hard
Guoguo: What will you do in the 1._______, Maomao?
Maomao: I will be a 2.______. I will fly a plane or a spaceship. I want to see the 3.______.
Guoguo: My father is a professor. I want to be a 4.________, too.
Maomao: You must study very 5._____ to be a professor.
Guoguo: You're right. I'm studying hard and will do so in the future.