He____for three years.

A)has joined the armyB) has been in the armyC) has been serving in the armyD) joined the army答案是B 为什么不选C？请多多指教 O(∩_∩)O谢谢

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第1个回答 2013-12-22

这就话表示的意思是现在完成时，C答案意思是现在完成进行时，所以选B

第2个回答 2013-12-22

是B

相似回答

He ( ) for three years.答：join 是终止性动词，不能和 for 搭配，排除 A, B for 引导的句子用现在完成时，排除 D 过去完成时祝你学习进步，更上一层楼！ (*^__^*)不明白的再问哟，请及时采纳，多谢 !

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for three years three years ago for three months forthreeyears中文 forthreeyears提问 forthreeyears翻译 for four years for three pairs at the same time