.—Was problem solved? —We were trying to think of way out but it was difficult to find

问题补充：

.

—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：

A. a; a

B. a; the

(答案→)C. the; a

D. the; the

解析：考查冠词。句意：问题解决了吗？——我们正在努力想办法，但是很难想出一个。结合语境可知上文是特指某个问题，用定冠词。下文泛指认为一种方法，用不定冠词。选C。