--- Hey, Tom．I think I am quite familiar with these photographs．
--- It is impossible for anyone_________ them before, because Mr．Newman had them developed today．
A．having seenB．to have seenC．to seeD．seeing
B
考查非謂語動詞。本題考查不定式的時態(tài)，根據(jù)句中時間狀語before，故用其完成式，選B。
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