67. The underlined word “officials” (Para．4)most probably refers to“

   A. the researchers involved in the experiment

   B. the inspectors of the football tournament

   C. the referees of the football tournament

   D. the observers at the site of the experiment

【解析】C. 短语的理解不仅要基于上下文，也要紧扣短文主题，不论是上下文还是结合短文主题，这里的officials都应该指referees．