Pronounciation purposes. Sometimes we add E to prepositions because then it is easier to say. For example:
V (in): V obchodě (in a shop) but VE škole (at school),
K (towards): K obchodu (towards a shop) but KE škole (towards school) and so on...
Thanks for the explanation. I read elsewhere it is often determined by 3 constanants in a row (ve krku), but now by simply saying the following word out loud I can hear when you need it. Saying "v škole" certainly causes your lips to blow out in an unnatural way.
Translations with "beze mě" are accepted. Perhaps there was something else in your answer that Duo didn’t like. For troubleshooting, it’s very helpful to (a) use the report button and (b) paste your complete answer into your comment.