7. 1 seem him somewhere before.

   A. seeing   B. to be seeing.

   C. to have seen   D. having seen

7. C

7. C解析：seem后接不定式，由句意知 see的動(dòng)作已經(jīng)完成，故用to have seen。

題目來源：2016年周測(cè)月考直通高考高中英語必修4外研版 > 周內(nèi)課時(shí)練22 Period 2 Introduction & Reading and Vocabulary—Language points

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