单选题 How often have you queued for ______ seems like hours at the booking office before you can get a train ticket?
A. what B. which C. that D. when

【正确答案】 A

【答案解析】[解析] what此处是关系代词，引导名词性从句作介词宾语，for what seems like hours意为for a long time。全句的意思是：“你在售票处前排了似乎好几个小时才买到火车票，这种情况经常发生吗？”又如：I don't care about money or about what people call position. 我不在意钱，也不在意人们所说的地位。