1) He must have finished the task yesterday, ______? A. mustn ’ t he B. didn ’ t he C. hasn ’ t he D. haven ’ t he 2) He must have finished the task , ______? A. mustn ’ t he B. didn ’ t he C. hasn ’ t he D. haven ’ t he 3) He must be watching TV, ______? A. isn ’ t he B. mustn ’ t he C. won ’ t he D. wasn ’ t he 4) He can ’ t be at home, ______? A. isn ’ t he B. is he C. can ’ t he D. can he 5) I don ’ t think that he will fail in the final exam, ______? A. do I B. will he C. don ’ t I D. won ’ t he