问题
选择题
—Was ________ problem solved?
—We were trying to think of ________ way out, but it was difficult to find one.
A．a; a
B．a; the
C．the; a
D．the; the
答案
答案：C
第一空特指双方都知道的 problem，用定冠词 the；第二空泛指方法，用 a。
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