Life is short， so you have to make the most of it． Has anybody ever told you that？ Maybe they just said ‘‘YOLO" to you instead． It
(1) "You Only Live Once"， and is a very popular saying on social media．
Having a YOLO attitude means that you make the
(2) of every day． It means you life
(3) you only get one． Someone who has a YOLO attitude is always open to doing new and fun activities．
Now， thanks to a US study， YOLO might be more than just a popular
(4) ． The study found it might be
(5) to have a YOLO attitude!
A research team did an experiment with two groups of students
(6) different US universities． One group pretended（假装） they only had 30days left before moving to a new city． They did lots of activities and
(7) time with people they loved． In other words， they had a YOLO lifestyle． Another group continued to live
(8) normal lives．
At the end of the experiment the students did a survey to
(9) how happy they were． It showed that the first group was much happier．
"The study shows that being and making close friendships are important to
(10) life，" the research group told The Washington Post． However， they also called on others to do experimerits with different groups of people and． see if their results were similar．