如图所示，实数a=$\sqrt{3}$，则在数轴上，表示﹣a的点应落在（　　）

材料一： 2016年冬进入取暖季以来，东北多个地区又遭十面“霾”伏。强雾霾事件既有气象原因，更有污染排放等人为原因。

材料二：《人民日报》载文指出：发展必须是遵循自然规律的可持续发展，尊重自然，呵护自然，人与自然相协调，这样的发展才是可持续的发展；各地情况不同，在发展速度上需要因地制宜，不能“一刀切”；要像对贫困宣战一样，坚决向污染宣战，要用铁规、铁腕来强化污染治理，全民积极行动起来，用零容忍的态度攻克污染防治问题，才能守住碧海蓝天，保卫人类唯一的家园。

根据短文的理解，选择正确答案。    In two days, I will be turning 30. And I was not looking forward to a new decade (十年). I was afraid that the best years of my life were behind me.
    One day, I met with my friend Nicholas. He was a 79-year-old man. He noticed something was different about me and asked if anything was wrong. I told him what I was anxious (焦虑) about and asked him: "What was the best time of your life?"
    Without hesitation, Nicholas replied: "Well, Joe, when I was a child in Austria and everything was taken care of for me, that was the best time of my life."
    "When I was going to school and learning the things I know today, that was the best time of my life."
    "When I got my first job and got paid for my work, that was the best time of my life."
    "When I met my wife and fell in love, that was the best time of my life."
    "World War Ⅱcame, and my wife and I had to leave Austria to save our lives. When we were together and safe on a ship, that was the best time of my life."
    "When I became a young father and watched my children grow up, that was the best time of my life."
    "And now, Joe, I am 79 years old. I have my health, I feel good and I am just as in love with my wife as I was the day we met. This is the best time of my life.

The boy is      young      carry the bag of rice．  

 选出不同类的单词。