G Complete the sentences using must(n't), can't, (don't) have to, should(n't), ought to, had better. Sometimes more than one answer is possible. 36 You ........................ walk the dog again. John walked him an hour ago. 37 You look very pale. You ........................ take some aspirin and go to bed. 38 I'm afraid you ........................ park here. 39 This is an old-fashioned school. All students ........................ wear a uniform.