Welcome to the Forums! You are correct to use me in this case. The commonly accepted test for the proper form is to remove the other part: in this case, 'my sister'.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
parcosmbut the exercise book states that instead of using "me", "I" should be used so the correct one will be "Melissa took my sister and I to the school".Your exercise book is wrong!