Помогите!!!!!

1) Fill in : shall, mustn't, should, can't, needn't or may.
1.You ............... be more careful.
2.You .............. feed the animals.
3. .................. I open the door?
4.Pedro ........... be home. There aren't any lights on.
5. .................. I say something, please?
6.You ................ shout. I can hear you.​