I will contact you on next Monday.用不用on?还是直接next monday?

I will contact you on next Monday.用不用on?还是直接next monday? 改错 what will you do on next monday?i will go to the reading we will go on a trip next monday 同义句 we will not have lessons on next monday. I hear there will be ___ talk on teenage probles next Monday --I hear there'll be____talk on teenage problems next Monday i will send the reprot to you before next monday? 为什么next Monday不加on on next monday night 英语语法问题 on next monday这种说法对吗? There is a meeting on monday (用next Sunday改写) want are your parenrts going to do (on) next monday为什么不用on