【原创】People feel ______(puzzle) by some unexplained phenomena, one example of is the possible existence of Yeti. is said that the Yeti is_____(tall) than an average human but walks with amazing speed and strengths. Though some people even reported________(see) the footprints belonging to a Yeti, no stronger evidence for its _______(exist) has been found.
_____the development of science and technology, _______ is unknown to us today ______(be) explained in the future. We hope that ______(science) will solve the mystery one day and give us a satisfactory answer.
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