问题
选择题
They are having _____ debate about whether the two countries were at _____ war at the time.
A．the; the
B．a; the
C．the; 不填
D．a; 不填
答案
答案：D
题目分析：句意：他们正在进行一场辩论，在那个时候，这两个国家是否在交战。第一个空，泛指“一次辩论”，故用不定冠词a；第二个空，be at war是固定用法，意思是交战，选D。