Нужна помощь по англ.языку complete the following sentences using the modal

Нужна помощь по англ.языку complete the following sentences using the modal verbs can , must, may , ought to, have to , be to , should, need , dare: 1)in september many students of our group came back to the capital... 2)though he understood that he was wrong... 3)when one is dictating one... 4)the conference is postponed... 5)don39;t think that i am interfering but... 6)i39;ve found him her, in the library... 7)i39;ve lost a book from the library... 8)the report is too long, you... 9)he doesn39;t know the truth.You... 10)is there any reason why you..? 11)if it39;s a matter of opinion, I...