根据对话情景,在空白处填入合适的句子
A: Hello, everyone! Today we’re going to talk about things in the future. I want to listen to your prediction.
B: Well, Miss Green. I think students won’t go to school in 50 years.
A: 21 ?
B: They’ll study on the computer at home.
A: Good. There will be more free time for students to do what they want. 22 . Do you think so?
B: 23 . There will be more and more robots working for people.
A: Oh, that will be nice. 24 ?
B: They’ll fly rockets to go to work or travel.
A: Sounds interesting! Tell me what your prediction is?
B: 25 . Everything will be free.
A: Great! You give us a wonderful future world!