一道英语语法的选择题It ——15 years since he left here.Awas B has been C

一道英语语法的选择题It ——15 years since he left here.Awas B has been C It ——15 years since he left here.Awas B has been C has D wil 英语语法好的来.It has been 3 years since he lived here. 15、 It _____ ten years since he left the army .A.is B.has C. It has been 3 years since he came here. It____five years since he left for Beijing.Awas Bhad been Ci It _____ ten years since he left the army . 　A. is B. has C. 分析一下它的含义?It is has been four years since he lived here． It has been five years since he has left for beijing这句话对不对啊 he has been here since he left college.对since he left colleg It has been several years since he lived here.怎么翻译? It ____ five years since he has left for Beijing.A.was B.has