Regarding the ability to go back in time, this make me remind = reminds me of the british flim, About time. Time travelling in other movies usually used for the special occassion and some situation which have to be fixed . However, in the this film 'About time', it focused on personal events.
Story begins from Tim's 21st birthday. His father call him to his study, and tell his son about big secret that all men in their family inherit the power of time travelling - only jumping in his own lifetime - His father advice Tim that all relatives using this power for the money or reputation end up their life with miserable result. So he wants Tim to pursue the values which he really cares. Tim choose love and met Mary. As time goes by, Tim matures and their relationship stabilizes = was established with several accidents.
At the end of movie, Tim lives his day twice. He enjoys and gives thanks to every moment by living the same day again. Earn the fortune or being famous also make us happy but this movie shows us different view of living our life.

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Hi May,

Thanks for doing your homework diligently. But I noticed that you just tell a story about the film "About Time" and wasn't able to answer the question "If you have the ability to go back time, what will you do? and why?'". Always remember that your first goal is to answer the question properly just like on IELTS exam. Anyway, Good Job!

Keep It Up! ^^

- Jai