题目内容
20．He _____this school for five years．（ ）| A． | had left | B． | has been away | C． | is away | D． | has been left |
分析 他已经离开这所学校五年了．
解答 答案：B．根据关键词for five years可知，强调一种持续的状态；本句是现在完成时态，其构成为：have/has+过去分词，主语he是第三人称单数形式，所以助动词用has；其动词要用延续性动词be away，其过去分词为been away，故选B．
点评 本题是对时态的考查，解决此类问题的关键是根据标志词和时间状语来确定动词的形式，在不同的语言环境中达到熟练掌握的目的．
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