Câu hỏi: Choose the letter A, B, C or D the word that has the underlined part different from others.

I’m Peter. I have been dreaming of having a robot for a long time. In the future, I may build a villa on the moon. I will live with a teaching robot, a worker robot, a doctor robot and a home robot. I will be able to do difficult homework with the help of teaching robot. A worker robot will help me build new houses. A doctor robot could look after me when I’m sick. And a home robot will do household chores for me every day. It will be convenient. I will be able to do researches on science and invent new things. Some people say it’s a bad habit to rely on robots. But I think robots are very helpful to human life.

Peter may build a cottage on the moon in the future.