单选题 We're happy to report that business is booming this year.
  • A. failing
  • B. open
  • C. successful
  • D. risky


【正确答案】 C
【答案解析】booming：兴旺的、繁荣的，和successful(成功的)意思相近；falling：下降的；open：开放的；risky：冒险的。