题目内容：
The last five years have seen alternate rises and falls in profits before tax, at the same time as fluctuating profit margins for the company. 参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：
单选题：The last five years have seen alternate rises and falls in
- 题目分类：初级
- 题目类型：单选题
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