Question

________ Mr Wang for over ten years，I didn't recognize him at the first sight of him．

1. A.
   To meet
2. B.
   No to meet
3. C.
   NO meeting
4. D.
   No having met

Answer 1

D
分析：从句子的意思看，not meet应是一个已经完成的动作，且not meet发生在not recognize之前，应用分词的完成时形式。
拓展点：having done是现在分词的完成时形式，表示的动作发生在句子谓语动词动作之前，其否定式应在分词之前加否定词not。