Up to now air pollution _____(do)great harm to human beings.

Up to now air pollution _____(do)great harm to human beings. UP to now up to now 造句 up to now 造句 just now ,so far ,up to now now it's up to up to now什么意思? Up to now的用法 用 up to now 造句 up till now 与up to now区别 up to now和up till now有什么区别 up till now和up to now的区别jiji up to now 和 up till now 的区别up to now和up till now的区别. up till now/up until now/up to now这三个用法有什么区别求解 Up till now有这种说法吗?Up till now是不是等于Up to now? air china flight()to kunming is now boarding through gate () It'S Up To You Now 歌词 up to now的中文意思是什么?