阅读下面短文，从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。

    The other day， I was getting into my car when I saw an old man walking up the hill. He looked tired， so I waited to see 1he was OK. He was fine， so I 2 him where he came from. He said that he just 3a train. He was almost blind， but I said he was4.

    We spent the next thirty minutes 5 about his life. He told me he invited 6 the army during the Second World War. And I even found 7 had a connection through a family member! We laughed so much that we almost cried.

    It cost me nothing other than thirty minutes of my 8. I learnt so much， and Albert enjoyed the talking and left smiling.

    I also had a(n) opportunity 9 to thank this great man for all he did to keep the country 10 during the war.

    Thanks， amazing Albert. You are an inspiration!

在容积为1.00L的容器中，通入一定量的N₂O₄，发生反应，随温度升高，混合气体的颜色变深．回答下列问题：

（1）写出该反应的方程式____，反应的△H____ 0（填“大于”“小于”）；

（2）100℃时，体系中各物质浓度随时间变化如上图所示．在0～60s时段，反应速率v（N₂O₄）为____ mol·L^﹣1·s^﹣1，反应的平衡常数K₁为____ ．

（3）温度T时反应达平衡后，将反应容器的容积减少一半，平衡向____ （填“正反应”或“逆反应”）方向移动，判断理由是____