![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
The clever boy made a hole in the wall, _______ he could see _____ was going on inside house. The clever boy made a hole in the wall, _______ he could see _____ was going on inside house. A. which; what B. through which; what C. through that; what D. what; that The clever boy made a hole in the wall, _______ he could see _____ was going on inside house. A. which; what B. through which; what C. through that; what D. what; that