单选题 To deal with the ever-increasing number of tourists from Europe, the shuttle transport company has decided to provide ______ bus service on holidays.
  • (A) often
  • (B) really
  • (C) frequent
  • (D) many


【正确答案】 C
【答案解析】[理由] 空格后有名词词组bus service(公交服务)，得知空格内应置形容词。
根据上述，仅(C)及(D)为形容词，但根据语意，仅(C)应为正选。