A: Today we are going to talk about a great invention. It looks like a human being. 
B: It’s a robot.   
A: Of course not. The first robot was invented in 1921.
B:    .
A: Sure. They can take the place of humans to do some boring work. They can also do a lot of dangerous work instead of humans.
B:
A: No. Robots can do a lot of work instead of people in many ways, but people wouldn’t be replaced by robots. 
B: We get it.