How much did it cost to build the science lab?  Five ____ yuan.
A. millions  B. million  C. millions of
B

試題分析：句意：建設(shè)科學(xué)實驗室花費多少錢？五百萬元。Million百萬；在具體的數(shù)字里不用復(fù)數(shù)形式，如three million；但在短語millions of數(shù)百萬，要用復(fù)數(shù)形式；故選B。
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