题目内容
13．______ the time I got to the bus stop，the bus had already left．（ ）| A． | On | B． | In | C． | By | D． | With |
分析 等我到达公交车站时，公交车已经离开了．
解答 答案：C 根据the bus had already left，可知这是过去完成时．表示过去的过去．by the time到…为止．用于过去完成时．表示到过去一个时间点为止，某个动作已经完成了．故选C．
点评 本题考查by the time．此短语用于过去完成时．平时熟记课本重点句子是做题的关键．
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