BarackObama,

问题详情：

 Barack Obama, ______ president of the USA, and Mitt Romney started on Monday night to debate on ______ foreign policy in their third and final face-to-face argument.

A. the, /             B. /, the                C. /, /                  D. the, the 

【回答】

B

知识点：冠词

题型：选择题