Threementravelingonatrainbeganaconverstationaboutthewor...
问题详情：Threementravelingonatrainbeganaconverstationabouttheworld’sgreatestwonders.“Inmyopinion,”thefirstmansaid,“theEgyptianPyramids（金字塔）aretheworld’sgreatestwonder. Althoughtheywerebuiltthous...