1.It _____ten years since he left the army .

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1.It _____ten years since he left the army .
A:is B:has C:will D :was
2.There is nothing in his bedroom ______ a bed .
A:at B:for C:with D :but
3:______ to cut off the electricity before you leave is very important .
A:To remember B:Remember C:To forget D:Forget

ADA
1.选a,是说自从他离开军队到现在已经10年了,当然如果有has been更好,没有就选现在时,是说道现在为止的.
2.选D,他卧室里只有一张床.nothing but连用=only
3.选A,前面一直到leave都是主语,走之前关掉电源很重要.所以后面is是谓语动词,前面就肯定不能填动词原形.动词不定式短语可以当主语的.再根据含义选to remember.
再问：为什么第一题不选has呢，不是有since吗，它不是现在完成时标志吗？
再答： has 少个been 没有完成时完全可以用现在时代替。不一定是完成时标志。只是常用完成时，比如 it is a long time since our last holiday.自从我们上次度假到现在已经很久了。

1.It _____ten years since he left 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. It is ten years since he ____(join) the army 几道初中英语选题1,It ___ ten years since he left the army .(be )2,I It___ten years since he left the army.A.is B.has C.will D.wa 用since的话,本句应该是：It is ten years since he joined the army. It __ten years since he left Shanghai. It is three years since he joined the army.为什么是用joined而不是用ha It is 3 years since he joined the army.为什么用is不用has been