单选题 --Would you like some wine?
--I don't drink wine as a rule, but I don't mind a glass ______.
  • A. at any time
  • B. once in a while
  • C. more or less
  • D. all the time
【正确答案】 B
【答案解析】[解析] once in a while(=occasionally偶尔)与as a rule(=usually，in most cases通常、在多数情况下)相对。