The employees in this department, many of ______ you have met already, have been working here for at least ten years.Đoạn văn4/29Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions. The employees in this department, many of ______ you have met already, have been working here for at least ten years. which that who whomGiải thíchD. whom