Unit Fifteen

   1. 他们两人相爱是很自然的事。
      It is very natural that they two fall in love.

   2. 你们什么时候考试现在还没定下来。
      It hasn't been decided yet when we will take the exam.

   3. 问题是你想花多少钱买一台电视机。
      The problem is how much you want to spend on a TV set.

   4. 以前物价很低，可现在情况不同了。
      The price was very low in the past, but it is not the case anymore now.

   5. 中国人发明了造纸术和火药，这不过是常识罢了。
      It is common knowledge that the Chinese invented paper-making and gunpowder.

   6. 在这几种商品中，外国人正在占领我们的市场，我们必须有所警惕。
      Foreigners are taking over in these market areas.  We must watch out.

   7. 他们的产品在世界市场上占有很大的份额。他们现在关心的主要问题之一是为大众提供更为先进的产品和最佳服务。
      Their products have much of a position in the world market.  One of their main concerns
     is to present the public with more up to date products and best services.

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