根据下面短文内容，在短文的空格处填上一个恰当的词，使短文完整、通顺。

    A big company wanted to find someone to work for them. Lots of young college students came to ____ for the job, but only a small part of them were left. And this time, the company didn't plan to choose the right persons as usual.

    Here came the day when they took the final interview. A big box ____ of papers was placed on the way to the interview room, and a few papers were lying around the box.

    The first student came. He hurried along the way to take the interview. “Who put this ____ in the middle of the road?” the student said to himself, but he did not try to move the box away. Instead, he passed around the box and continued his way.

    The second student came along and did the same thing. Then another came, and another. All of them complained (抱怨) about the box but ____ of them tried to move it. What’s worse, someone even stepped (踩) on the papers and left without having a look at the things on the ground.

    Half an hour later, a thin young man with glasses came. He was also ____ those who were left to take the interview. He saw the box and the papers around it. Without thinking twice, he ____ and began to pick up the papers and put them into the box. Then he managed to move the box to the side. To his great ____, he found an invitation under the box. On it were the following words, “Congratulations, young man! You are the ____ person we are looking for! Would you like to join us?”

      Sometimes, you see, helping others is helping yourself.

—Did you join them?

关于公元前3000-前1700年世界其他地区人类生活的变化，我们所知的要少得多。在中国文明即将诞生的黄河中游地区，相当稠密的农业人口形成了，他们以粟为主要食物。甲这些农民在一种特殊的土壤“黄土”上耕作，这种土壤由冰川时期的风吹来的尘土

沉积而成，因此容易挖掘。黄土地区森林不多，因此，耕作技术与中东的刀耕火种大相径庭。正因如此，加上粟在其他地方不是重要作物，所以大多数学者认为，中国的农业独立于中东农业而兴起，虽然中东独特的作物小麦和大麦也从很早的时候就在黄土地区培植了。

在更南部的东南亚大河流域，公元前2000年代，另一种截然不同的农业也取得了更大的发展。【乙】在这些地区，季风是决定性因素：一年中有半年下雨。实际上这半年几乎天天下雨，其他时间则是干旱。雨季和旱季的明显交替意味着当地有洪涝，然后是土地逐步干旱。丙各种根茎作物天性都适合这种气候条件；水稻也是如此，它是季风地区的主要农作物。