为什么是mix it up而不是mix up it?

为什么是mix it up而不是mix up it? mix it all up 老师,还是昨天的对话：人教版8上.为什么是mix it all up.用mix them all up 可以吗?为什么? Here are the ingredients.Please______.A.mix it upB.mix up itC.mix them upD.mix up them mix it all up中 it 是什么意思 mix it all up中为什么有了“all”却是“it”而不是“them” Let Rose __(mix)it up put the ingredients in thye blender and--------,please.A.mix up it B.mix them up C.mix up them D.mix it up为什么？ mix it up 和 mix up it有什么区别?哪个是正确的?谢谢 mix it up与mix it all up有什么区别?会的童鞋答一下! mix和mix up的区别 mix together和mix up区别 mix with,mix over和mix up的区别是什么? mix up...with造句 These are the ingredients you need._____,please.A.mix it up B.mix them up C.mix up themThese are the ingredients you need._____,please.A.mix it up B.mix them up C.mix up them D.mix up it mix it all mix it all up和mix them upPut the ingredients in the blender and ________,please.A,mix it all up B,mix them up C mix up it D,mix up themA和B哪个对?根据新目标八年级上册第八单元,书上有原句,将它混合在一起用了mix it all u mix it all up 中的all 做什么成分?