参考答案

正确答案：B
解析：本题测试词组辨析。turn out：原来是，最后证明是。例如；The weather turned out to be fine. (结果天气很好。)turn in：交换，上交。例如：You must turn in your uniform. before you leave. (你离开前必须把制服交还。)show off：炫耀，卖弄。例如：show off one's knowledge(炫耀知识)。show up：变得突出，显得醒目。例如：White turns up well against a blue background. (在蓝色背景的衬托下白色显得更为醒目。)