Only in the past hundred years when electric lightening was developed ___ able to live,work and move about as if night no longer existed.A.has man been B.man has been C.have man been D.man have been解释下has 和have吧.

In the past,I can only say sorry. The past let it past,because it just like in life,only once, Remember the past,plan for the future ,but live in the present only In the past unimportant,important only has the present中文意思 Because all of these will be in the past,the remaining only memories是什么意思 in the past造句 Memory in the past in the past two in the past翻译 ：in the past century in the past long in the past few Trapped in the past in the past Emancipate yourself from the past.The only Never gone back to past time only recollection of hope in the future Do not care who in the past,now has only care about Only a few persons have been tried for treason in the past 50 years.如何翻译?