职教组卷基于海量职教高考试题库建立的在线组卷及学习系统
职教组卷
  • 题型:英语知识运用 题类:其他 难易度:难

    —Do you happen to know the professor     in Lily’s speech?

    —Yes.  I was introduced to him at a conference last year.

    A. referring to       B. to refer to       C. having referred to     D. referred to
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