问题补充：
is the population of the city?
A. How many
B. What
C. How many people
D. How much
答案：
A. How many
(答案→)B. What
C. How many people
D. How much
解析：句意：这个城市的人口数是多少。Whats the population of...？“固定句式，……的人口数是多少？”How many“多少，修饰可数名词复数”；How much“询问价钱”。故选B。
