Употребите модальные глаголы could, should, ought to там где необходимо ... you open the door, please? We did an exam

Could you open the door, please? We did an exam yesterday. We ought to do six questions out of ten. I\'m sorry I could not come yesterday, l ought to work late. It\'s late and you\'re very tired. You should go to bed. I wanted to speak to Martin yesterday but l could not find him.