Cрочно, нужно. много перепишите предложения, употребляя must+simple/perfect infinitive для выражения предположения. example: of course, he is somewhere here. – he must be somewhere here. certainly, she knew that something was wrong. – she must have known that something was wrong. i am sure the information was wrong. she was obviously upset by something. probably, he recognized you by the photo in the papers. he is sure to be in at this time. of course, she is trying to help you. she is certain to be waiting for you at home. probably, the play is over by now. no doubt, she knew what she was about to do. probably, the dog was hungry.

Как я провел летние каникулы i think summer is the best season of all because it is warm, the nature is beautiful and we have great opportunities for rest. summer is a time of holidays. we can go anywhere, spend our time near a river or a lake on fresh, green grass, swim in warm water, or climb mountains, play different games, ride a bicycle and so on. i spend my summer holidays at my granny’s. there are many things there to do. what i did most of the time - i swam in the sea and sunbathed. sometimes i made a fire with my friends at the seaside and cooked potatoes there. it was wonderful. we told anecdotes to each other, and did everything we wanted. i also got used to walk alone in the forest. when august was coming to its end, i went on a small voyage by ship. the ship name was “sevastopol”. but this summer wasn’t for me only sugar and honey. i have passed through the graduating exams after school and entering exams in the university. so the bigger part of my summer vacations i spent sitting with the books. of course, it was not interesting, but i’m glad that i did it because now i’m a student of the best university in our country.