选择题——_____ of the population of the city _____workers?

问题描述:

选择题——_____ of the population of the city _____workers?
——_____ of the population of the city _____workers?
——About 60 percent.
A. What; is B. What; are C. How much; is D. How much; are
答案选D 哪位大虾指点下~?不是说 what's the population of ..而且后面怎么会用are呢?

因为回答是用百分率 而 what's the population of 回答应该是具体数字
用are 因为workers 是复数
完整回答是 About 60 percent of the population of the city are workers