![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
Part I (para.1-3) introduces a story of closing doors to open ___________________ about Xiang Yu. Part II (para.4) serves as a transition from the ancient story of Xiang Yu to the __________ of the students at MIT. Part III (para.5-9) mainly focuses on the experiment conducted by ________. Part IV (para.10-12) suggests how we can balance our lives by reducing ________________. Part V (para. 13-14) concludes the essay, and meanwhile it raises the question if ___________________ .