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A. It was Tom who suggested that I open the bottle.
B. I opened it easily without any help.
C. I put it between my knees and began to pull.
D. The guests gave me many helpful suggestions.

A. people can live from 120 to 180
B. it is still doubtful how long humans can live
C. the human body is designed to last past about 120 years
D. it is possible for humans to live longer in the future