Communities like r/German on Reddit are helpful for asking specific questions about tricky exercises in the Menschen series.
Do not simply copy answers from the key into your book. This is called Abschreiben (copying), and it will destroy your learning progress. You will pass the test but fail the real conversation. menschen kursbuch a1.1 answers
Always check the article: dem = masculine/neuter dative; der = feminine dative. Communities like r/German on Reddit are helpful for