I ____ for the bus for the past 20 minut

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问题 I ____ for the bus for the past 20 minutes and still it has not come.（　　）A． wait B． waited C． have waited D． have been waiting

选项 A． wait
B． waited
C． have waited
D． have been waiting

答案 D

解析从从句“车还没有来”判定，说话者说话时已经等了、正在等，并还会继续等。这种情形应当选择现在完成进行时，故选D。

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