Complete the text with the past simple or past continuous form of the verbs in the box.believe • come across • fi n d • hearkill • not help • sleep • travelOne of Agatha Christie’s most famous novels is Murder on the Orient Express. Private detective Hercule Poirot, (a) ................ from Istanbul to London on a luxurious train called the Orient Express when he (b).................. an American businessman called Mr Ratchett. Ratchett (c) ........................ that his life was in danger but Poirot (d)............. him. On the second night of the journey, Poirot (e)............ in his bed when he (f).............. a cry from Ratchett’s compartment. The next morning, the train staff (g)............ Mr Ratchett was dead. Poirot (h)............ the evidence and discovered that Ratchett had killed someone in the US and that all the people in the coach had a connection to that person’s family. So, who (i) ................ Ratchett?