it up to sb.to deside

It's up to sb to do it is up to sb to do it up to sb.to deside it's up to sb.to do sth. 请问,It is up to sb.to do sth. it seems to sb sb.is up to sth. sb.is up to sth. run up to sb三扣拉 be up to sb’s measure up 和measure up to sb sb.spends some time doing sth.it is+adj.+for sb.to do sth.it's up to sb.to do sth.造句 各两句 it is up to sb to do sth以及他的用法, it is up to sb for sth 还是to do sh? it occurred to sb that... 1.not until 2.be going to 3.It's tine for sb to do 4.It takes sb sometime to do sth 5.look up 造句 it.is.up.to. It's up to