Change 'Who owes who' to 'who owes whom'
Grammar! 80-97% sure
PS - I work on feedback for my company so I know what a pain it is to deal with this. Thanks!

Hi Anon!
Actually, we deliberately choose to do “who owes who” instead of “who owes whom” because it sounds less stuffy. :) Even though whom is technically correct, it sounds a bit archaic to our ear in standard spoken english.
We love responding to feedback! :) Just haven’t been as fast as we like to be recently – for which we apologize. Just trying to focus on building more great stuff.
-
Crest pak commented
English exercises Present Perfect focus on reinforcing learners' understanding and usage of the present perfect tense in English grammar. These exercises provide practice opportunities for correctly forming and using present perfect verbs to describe actions that occurred in the past and have relevance to the present moment. Learners engage in activities such as completing sentences with the appropriate present perfect verbs, rewriting sentences to express past experiences or accomplishments, and identifying present perfect verbs in written or spoken texts. By actively participating in these exercises, learners can enhance their ability to communicate effectively about past events with a connection to the present. Engaging in <a href=''https://exercises.one/''>English exercises</a> regularly aids in language skill development. Mastery of the present perfect tense is essential for conveying experiences and achievements accurately, making these exercises valuable for learners at all proficiency levels.
-
Scott Johnston commented
Using the phrase "who owes who" basically sounds like you're ignorant of the proper use of the English language.