argument求狠批

无镞之箭UID: 3440166

第15题 题目在word里面  感谢

writing101UID: 3473575

可以直接把文章贴出来吗？

大概看了一下，题目中最主要的逻辑错误是, only about 2 percent of customers have complained, indicating that an average of 98 people out of 100 are happy with the change. 没有抱怨就代表高兴吗？
many servers have reported that a number of customers who ask for butter do not complain when they are given margarine instead. Clearly, either these customers do not distinguish butter from margarine or they use the term ‘butter’ to refer to either butter or margarine.
典型either...or选择，事实上很可能有其它解释。可惜作者给出的解释有点不靠谱，margarine在欧美算不上a complex noun, 男女老少都知道。
除以上两点之外，其余是比较次要的技术问题，比如 a number of, 因此建议作者将主体第二和第三段交换一下。

开头段写得比较流畅，可惜后面的语法问题较多，不知是否因为40min写完没有修改。