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Choose the most natural sentence to describe an ongoing future activity with duration:

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

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Choose the most natural sentence to describe an ongoing future activity with duration:

A

By lunch, he will have been sleeping for 12 hours.

B

By lunch, he is sleeping for 12 hours.

C

By lunch, he will be sleeping for 12 hours.

D

By lunch, he has been sleeping for 12 hours.

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