It's high time,if we human beings are to survive ,we_____(承诺)to do sth to improve the environment

It's high time,if we human beings are to survive ,we_____(承诺)to do sth to improve the environment it's high time that we did sth.这里为什么要用虚拟语气? It's high time...的用法 it's high time的用法? It’s (about/high)time+that: 请问it's high time 的用法 it's high time that怎么翻译 英语：it's high time是什么意思?详细! it's high time that the fighting therefore,it's high time we did something about it啥意思应该用did吗,是不是用do啊. It’s high time that we _______our work and ______supper now.stop; have B.stopped; had C.stop; s it's high time that we did sth.这里为什么要用虚拟语气?it's time to do sth,这里为什么不用虚拟? It’s high time we _______ our disputes.A.shall settle B.Settled C.will settle D.are to settle it's high time we were going.这里的were going 可以可以换成 went和should go 翻译It is high time that we solved the problem it is high time that we placed great emphasis to. It's high time that we all__.A:took it seriously B:took is serious B:take it seriouly D:take it serious 选哪个 It is high time