单选题 Mary ______ that piece of cake for twenty yuan.
  • A. spent
  • B. cost
  • C. bought
【正确答案】 C
【答案解析】[解析] 本题考查近义词辨析。sb.buy sth.for some money；sb.spend some money on sth；sth.cost sb.some money，注意这三种同定搭配形式。