on i____ open day

on open day还是in open day? on the Open Day 意思 是on the open day还是in the open day 英语作文on the open day open day Miss Black wants to ( )my parents on the Open Day. What did you do on the Open Day last Saturday? visited parents our many school Day on Open How___all the parents look on the Open Day. Did your parents listen to the choir on open Day we were very happy on Open Day .(改为感叹句) on open