What were some accomplishments of the Indus Valley civilization of Mohenjo-Daro and Harrappa?

um....i kinda have a Midterm tomorrow in Gl but my teacher didn't exactly answer the last 2 questions of the review for it so i didn't know the answer. my lil bro has been playing till ow and the only reason why i haven't cheeked is because i don't have mach time to study anymore. im not really a fast learner so...um...yeah.what im asking is for someone to please tell me the exactly answer not by web just like that so i can write them on my index cards and study them. pretty please~!!!:(