Хелпхелпэелп, их тут много таких заданий , буду скидывать есчо

1. he must be very incompetent in economics. 2. brian must have been very inexperienced in mountaineering. 3. they must have failed to realize the danger. 4. the lawyer must have failed to find the clue to the crime. 5. the committee must have been misinformed of the coming changes. 6. everybody must have done the right thing. 7. this young man must have had no chance to succeed. 8. the fax must have failed to reach him. 9. the doctor must have failed to read my mind. 10. the detective must have misunderstood the policeman's words. 11. the poor thing must have been unaware of it all the time. 12. the parents must have been quite unconscious of the child's strange ways. 13. the landlady must have been very careless in choosing the tenants. 14. she must have disliked him all her life. 15. he must have done nothing about it, i can see no changes in the design.