题目内容
12．Hurry up!The concert ________ for ten minutes．（ ）| A． | has begun | B． | has been on | C． | began | D． | was on |
分析 快点！音乐会已经开始十分钟了．
解答 答案：B．
根据for ten minutes，可知这里表示一段时间，通常和现在完成时连用，现在完成时的构成是：主语+have/has+动词的过去分词，由于时间状语是时间段，所以句中谓语动词要用延续动作动词，begin是非延续性动词，在这里不能用，要用能延续的be on表示，套用结构故选B．
点评 本题考查了动词的时态．做题时，一定要特别关注有关的时间短语，这是判断句子时态的标志．在没有时间状语的情况下可以联系上下文根据语境来做出正确判断．
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