— the population of the U.S.A. in ?—It about 296 million.A.What is; is B.What was; wa

问题补充：

— the population of the U.S.A. in ?

—It about 296 million.

A.What is; is B.What was; was

C.How many is; was D.How many was; is

答案：

解析：what’s the population of+城市或国家的名字用来询问一个国家或地区的人口。其答语用it来回答。