I don't know how they deal with the problem=I don't know （ ） they（ ） （ ）the problem

I don't know how they deal with the problem=I don't know （ ） they（ ） （ ）the problem
I don't know how they deal with the problem=I don't know （ ） they（ ） （ ）the problem

I don't know how they deal with the problem=I don't know （ ） they（ ） （ ）the problem
I don't know how they deal with the problem=I don't know （what ） they（do ） （with ）the problem
how 后面用deal with
what 后面用do with

这是固定用法



希望能帮到你,祝更上一层楼O(∩_∩)O
有不明白的请继续追问(*^__^*)

I don‘t know what they do with the problem