—Who is the old man talking with your teacher? —I don’t know. I him before.A. was never

问题补充：

—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：

A. was never seeing

B. had never seen

(答案→)C. never saw

D. wouldn’t see

解析：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。