She has set a new record,that is ,the sales of her latest book____50 million

题目

She has set a new record,that is ,the sales of her latest book____50 million
A has reached B have reached
为什么啊 sales 不是单数么?

答案

sales of her latest book
判断这种of结构要看of之前的单词的单复数.sales,所以是have reached
唯一的例外是 a number of...表示很多、大量的⋯⋯(如：a number of students)后接are/have
sales虽然是销售额的意思,但一般还是当复数用,
如：Sales are down this month.这个月的销售额减少了.
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