1.My watch has stopped.There is something wrong with it.2.Have you seen Jack today? - Yes , I saw him at the institute.9.Have you heard the new symphony by M.? - Yes , I have -When did you hear it? - I heard it last Sunday.3.You have changed so much. Has anything happened?4.What are you doing here at such a late hour? Are you writing your composition? - No , I have already written it.I am working at my report.- And when did you write you composition? - I finished it two days ago.5.I say , Tom , let`s have dinner.-No , thank you , I have already had dinner.6.What is the weather like? Is it still raining? - No , it has stopped raining.7.She left the room a moment ago.8.We have not solved the problem yet.9.When did it all happen?10.The morning was cold and rainy , but since ten o`clock the weather has changed and now the sun is shining brightly.11.Show me the dress which you have made.Oh , how dark it is! A large black cloud has covered the sky.I think it will start raining in a few minutes.12.Oh , close the window! Look , all my papers have fallen on the floor because of the wind.13.When did you open the window! - I opened it ten minutes ago.14.What has happened? Why are you crying? Have you hurt yourself? '' I asked.15.As soon as I saw him , I understood that he had been working/was working hard.He was writing something and did not notice anything.16.When I came home yesterday, the children were running and singing merrily.''We have learnt a new song!" they cried.17.When the young man entered the room , she looked at him in surprise.