dig up a problem 为什么不能是dig into a problem

dig up a problem 为什么不能是dig into a problem ___the earth,and youll find some earthworms.A.Dig into B.Dig out C.Dig away D.Dig up dig up什么意思 蓝爷爷任务：Dig up a magnifying glass 怎么完成? dig out和dig up的区别 Dig a Dig a Dig a Dig a Dig a Dig a dig up 与dig out的区别dig up 与dig out有区别吗? dig up和dig out的区别是什么啊 dig up 与dig out的具体区别 i am going to dig it up.what____?A byB fromC toD WITH let you dig up a plant to make room for another dig in,dig up,dig down,dig into的区别She's one of those reporters who are always trying to (dig up ) dirt on celebrities dig dig They are trying to come up with a solution to problem.为什么solution 用to 是因为solve to do 改同义句：At last,children came up with a good solution to the problem.At last,children _____ _____ a good solution to the problem.答案填thought up,请问能不能填thought out?为什么? The problem ________ at the meeting yesterday.A.came to B.came across C.came up D.came up with为什么不选D This is a dig eye.