单选题 Advertising (falls into) two (main) (category): consumer advertising (and) trade advertising.
  • A. falls into
  • B. main
  • C. category
  • D. and


【正确答案】 C
【答案解析】名词的单复数错误，应改为categories。因为前面的数词是two，category是可数名词，应用复数。