Sure! Here are a few more examples using the phrase "what in doing":
I can't focus on my work with all this noise. What are they doing out there?
I heard a loud crash from the kitchen. I wonder what they were doing.
The children were giggling in the other room. I went to see what they were doing.
My neighbor's dog was barking nonstop. I went to see what it was doing.
I saw a group of people gathered around something. Curious, I went to see what they were doing.
In these sentences, "what in doing" is used to express curiosity or a desire to find out about someone's actions or activities.
用what in doing造句
What good is there in doing that?