影视英语口语:难以定夺

“难以定夺”在英语口语里能怎么说？

蹩脚口语：hard to do
地道口语：have work cut out

素材来源：《欢乐合唱团》

剧情简介：
因为抽到上上签，合唱团成员一个个都消极怠工。为了激发大家的斗志，Will让团里男女PK，不想两边都服用了Terri给的药片儿，个个High得呀……
Rachel: While the boys chose a selection of songs that cast an eye inward on the irresponsible life choices and sexual hunger of today's modern teens, we have chosen a selection of songs that speaks to the nation as a whole during these troubling times filled with economic uncertainty and unbridled social woe. Because if there's two things America needs right now, that is sunshine and optimism. Also angels.
Singing "Halo/Walking on Sunshine"
Will: ladies,I... I don't even know what to say. You did such a good job. I don't know what you guys did, but whatever it was,keep doing it. Our celebrity judge has her work cut out for her.