Question

— What's the population ____ the U.S.A?
— The U.S.A has ____ population of 297 million.

A．of…a

B．of… /,

C．in…a

D．in … some

Answer 1

A

试题分析：提问人口用What's the population of……population作为人口的意思来说时，是可数名词用作单数，故选A。