单选题 Fresh air is ____________ to good health. So you should go out more and take more fresh air.

【正确答案】 A
【答案解析】[译文]新鲜空气对身体健康至关重要,所以你应该多出去呼吸新鲜空气。
[解析]形容词辨义。fundamental(to)意为“必要的,基础的”,如:an example that was fundamental to the argument(论据中的一个主要例证);elementary意为“初步的,基本的”,如:an elementary reading book for a child who is learning to read(为识字儿童编的初级读物);principal意为“主要的,首要的”,如:Once the principal contradiction is grasped.all problems will be readily solved.(一旦抓住主要矛盾,一切问题就迎刃而解。)dominant意为“占优势的,支配的”,如:the dominant businessman(最有势力的商人)。