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Correct all errors in this sentence: I think that by the year 2050, humans will been traveled to Mars already.

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This question belongs to "Thì tương lai hoàn thành – Future Perfect" on Học Mỗi Ngày. Review the answer, solution, and related items in the same set to study more effectively.

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Correct all errors in this sentence: 'I think that by the year 2050, humans will been traveled to Mars already.'

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