Recently，I failed an exam．However，after I came out of my teacher's office，I told myself"smile!It's not so serious．"
I smiled a big smile and （71）___ worked a little，really．
Everyone gets frustrated sometimes．I used to be always influenced by pressure and I was often in low spirits．But one day I came（72）___a sentence in the Bible："Do not be anxious about tomorrow，for tomorrow will be anxious for itself．Let the day's own trouble be sufficient for the day．"It suddenly （73）___ （strike）me，"（74）___（worry） about a problem doesn't help．Why not just give a big smile and face up to the trouble？"
Now every time I want to cry，I remind myself that（75）___（laugh） is better than tears and anger．I am （76）___（convince） that there'something magical about a smile．A smile helps me recover confidence and gives me （77）___ courage to move on．
Remember，whenever you're faced with a setback （挫折），whenever you've been（78）___（fair） treated，（79）___ it takes is determination and you can feel happy again．Smile at life，（80）___it will shine on you．