Complete the sentences with mustn39;t or needn39;t You.. stay up late-

Complete the sentences with mustn39;t or needn39;t You.. stay up late- you39;ve got school tomorrow morning. We ... leave the door open- Kate has got a key You ... write to your parents about this - I39;ve already written to them You ... ride your bike so fast- we39;ve got plenty of time You.. stay up late to learn this poem- I39;ll learn in the morning. We... leave the door open- the rain will come in You.. write to Ann about this - if you do, she39;ll tell everybody You.. ride your bike so fast- the road is wet