Why do you look so gloomy ? What are you looking for ?   My dissertation . I put it somewhere last night and I can't find it now .   Did you finish typing yesterday ?   Yes , I kept on typing it until midnight , but it is lost .   Don't worry about it . It must be somewhere in your room . Let's see where you put it . Have you searched your drawers and the desk ?   Yes , but there is nothing inside the drawers or on the desk . 