现在完成时 自他参军至今已有十年了.It is ten years since he jioned the army.s

英语 自他参军至今已有十年了. It is ten years --- he --- the army It is ten years since he ____(join) the army 用since的话,本句应该是：It is ten years since he joined the army. It _____ ten years since he left the army. It _____ ten years since he left the army . 15、 It _____ ten years since he left the army .A.is B.has C. It _____ ten years since he left the army . 　A. is B. has C. Three years __________ since my brother jioned the army. it is ten years since he worked here为什么既指他已经在这工作十年了,又指他不在这工作 It is 3 years since he joined the army.为什么用is不用has been It is ten years ince he left the army 翻译 为什么用is 1.It _____ten years since he left the army .