听第8段材料，回答6~8题。Whatistherelationshipbetweenthetwospeakers?[A]Theyarebrotherandsister．[B]Theyaremotherandson．[C]Theyarehusbandandwife．
听第8段材料，回答6~8题。Whatistherelationshipbetweenthetwospeakers?[A]Theyarebrotherandsister．[B]Theyaremotherandson．[C]Theyarehusbandandwife．
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