Question

-----Have you seen___ pen? I left it here this morning.

-----Is it __black one? I found it in the corner.

 A. a, the       B. the, the?    C. a, a       D. the, a

Answer 1

A

解析:

此题的最佳答案就是A，前空泛指，后空特指“谈话者都知道的东西”。