请教陈向东书里的一题

llxx1985cn

Years ago, consumers in Finland began paying an energy tax in the form of two Finland pennies for each unit of energy consumed that came from nonrenewable sources. Following the introduction of this energy tax, there was a steady reduction in the total yearly consumption of energy from nonrenewable sources.

If the statement in the passage are true, then which of the following must on the basis of them be true ?

答案为There was a steady decline in the yearly revenue generated by the energy tax in Finland.

它还有一个选项为There was a steady increase in the use of renewable energy sources in Finland.为什么不对呢？

yejinleaf

楼主 made an assumption that the total amount of energy consumed would not change.

But 原文 did no say so.

So, 另一个选项不对。

llxx1985cn

明白了，谢谢！