题目

 —Who is the old man talking with your teacher?    —I don’t know. I _________ him before. A. was never seeing                                   B. had never seen C. never saw                                         D. wouldn’t see 答案：C before表示要用过去时，意为“我以前从未见过他”可排除B、A，并根据上下文语境，排除D。

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