Door closer, are you? When faced with 1. ____ options, XiangYu proved to be a wonderful decision-maker. He took his troops making a 2. _____ into enemy territory. To his troops’ 3. ___________, he ordered their cooking pots 4._______ and their sailing ships burned, which gave his troops only one 5._______: to win the battle. The battle turned out to be a great success on his side. This story indicates that while closing the door for doing something, people may open the 6._______ for achieving something more significant. Through conducting an experiment on human’s 7.________ behavior, Dr. Ariely found that many students in his experiment just couldn’t bear to see their options 8. _______ though they knew they would 9.______ from doing so. He then emphasizes that in life the doors are actually closing 10. _________ and we don’t see the future vanishing away. To solve this problem, people can 11. ________balance in their lives by reducing 12.________ options on their own and keeping those activities that will actually 13. ______ their lives. To conclude, we should close certain doors in order to allow the right windows of 14. _________ and 15. _______ to open.