—________ 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
B

試題分析：句意：2005年美國人口是多少？大約296 million。對population提問常用What，時間是2005，所以用一般過去時。population相當(dāng)于一個整體,謂語是但是，所以用was。故選B。
考點: 考查疑問詞和動詞時態(tài)的用法。
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