Choose the correct answer

Tom hadn`t locked his car and it was stolen. He _______ it.
1. should have locked
2. should locked
I can`t sleep sometimes. My neighbors play music all night. They ___ play music all night.
1. shouldn`t play
2. shouldn`t have played
The picnickers left litter everywhere. They _____ it.
1. shouldn`t done
2. shouldn`t have done
Emma hadn`t paid much attention and caused an accident. She ______ more careful.
1. should have been
2. should been
Where is your bag? You _____ it in the living room.
1. must left
2. must have left
You _____ these flowers, I have already bought them.
1. needn`t have bought
2. didn`t need have bought
I ______ a coat yesterday because it was warm.
1. didn`t need to wear
2. didn`t need worn