What 2 methods can an alumni association use to keep you up-to-date？

What does the talk mainly concern？

听力原文：Woman: My job involves a lot of hardship, business trips, irregular life and that kind of thing. Last week I sold pure cotton and cotton wool to a business from Chicago. We bargain every item for a long time. It began from the inquiry about our products to final settlements. Fortunately, every deal was accomplished. The company and I both gained some returns.

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SECTION A CHINESE TO ENGLISH

Directions: Translate the following text into English.

有的动物学家和心理学家把现代人比成笼中的狮子。他们认为人们生活在拥挤的城市里，与动物园里的动物很相似。因此，城市的居民变得特别地好斗。如果人口增长速度慢一些，人们会有更多的空间和自由。在史前，大约六十人的群体会有数公里的空间可供漫步和觅食。假如现在还有这样的条件，人类就不会比其他动物更好斗。目前可能多达三万人在同一栋办公室里工作？。这样，人们之间变得寻衅好斗也就不足为奇了。实际上，要他们不这样做几乎是不可能的。近年，由于世界人口的增长，人类必定变得更为好斗了。

What does business concern usually do？

How many teachers come to school by bus？