问题
选择题
—________ the population of the U.S.A. in 2005?
—It ______ about 296 million.
A. What is; is B. What was; was C. How many was; was
答案
B
题目分析：句意：2005年美国人口是多少？大约296 million。对population提问常用What，时间是2005，所以用一般过去时。population相当于一个整体,谓语是但是，所以用was。故选B。
考点: 考查疑问词和动词时态的用法。