Put the correct modal verb.
1 That can/won’t/ought to be Alice knocking the door. She said she would come back.
2 I really might/must/may respond to teacher’s email.
3 She mustn’t/needn’t/can’t mop the floor – her mother has already done it.
4 All of us know she doesn’t like Peter, but she need/shall/could at least tell hello him.
5 Not many gentle people may/can/ought to speak the Spanish language .