47年前，39岁的屠呦呦代领团队收集了2000多种方药，不断筛选、改进提取方法，数十年如一日，终于发现了青蒿素，解决了全球数亿疟疾患者的困扰。2015年10月5日，85岁高龄的屠呦呦因此获得了诺贝尔生理学或医学奖。屠呦呦的事迹给我们的启示是（    ）

    When you are feeling unhappy or forget how great you are, these are five w____ to make you feel good about yourself.

    ①Look at the mirror and say to yourself, “I am a s____ person and there's no one in the world like me. I can do anything!” It may not sound so good, but it really w____!

    ②Do something nice for someone. Helping o____ always makes you feel good.

    ③Smile! Be f____ to people you meet. Look for the g____ things in your friends and family.

    ④Read and write a d____. Turn off the TV and let your imagination fly! Write down your thoughts, dreams or a____ you want! Writing always h____ to express(表达) your feelings.

    ⑤Stay with your family. We all need our family time. T____ with your mum or dad or maybe even your cousin.

下列合并同类项的结果正确的是 （    ）

分数  的分子和分母的最大公因数是____，化成最简分数是____。