阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答卷标号为16-25的相应位置上。
Recently I failed an exam．However,    I came out of my teacher’s office．I told myself: "Smile! It’s not so serious. "
I smiled a big smile and    worked a little, really．
Everyone gets     （frustrate） sometimes．I used to be always influenced by pressure and I was often in low spirits．But one day I came   a sentence in the Bible: “Do not be anxious about tomorrow, for tomorrow will he anxious for itself．Let the day’s own trouble be sufficient for the day．" It suddenly struck me: " （worry） about a problem doesn’t help．Why not just give a big smile and face up    the trouble?"
Now every time I want to cry, I remind myself that    （laugh） is better than tears and anger．I    （convince） that there’s something magical about a smile．A smile helps me recover confidence and gives me  courage to move on．
Remember, whenever you’re faced with a setback, whenever you’ve been treated unfairly, all it takes is determination and you can feel happy again．Smile at life．it will shine on you．