Unit 1FogFog warningWhen Polly left home that morning, the city was already covered in a grey mist. At lunch, the radio forecast that the mist would bee a thick fog in the afternoon. At four o'clock, Polly left work and stepped out into the fog .She wondered if the buses would still be running. No buses to King StreetOnce out in the street, she walked quickly towards her usual bus stop.‘How far are you going?’ the bus conductor asked her before he took her fare.‘King Street.’ said Polly.‘Sorry，Miss’ replied the man, ‘the truth is that it is too foggy for the bus to run that far. Take the Underground to Green Park. The weather might be better there and you might be able to get a taxi.’A tall manAs Polly observed the passengers on the train, she had a feeling that she was being watched by a tall man in a dark overcoat. At last the train arrived at Green Park station. While the rest of the passengers were getting out, she glanced at the faces around her. The tall man was nowhere to be soon.FootstepsWhen Polly got to the station entrance, it was empty. Outside, wherever she looked the fog lay like a thick, grey cloud. There was no one in sight. Polly set off towards Park Street. As she heard a man’s voice in her ear saying ‘Sorry.’ The man moved away. She could feel her heart beating with fear.The helpful strangerThen she heard the sound again-soft footsteps behind her. A minute before, she had wished for someone to e along. Now she wanted to run, but fear held her still. The footsteps seemed close now. Then a man’s voice came out of the darkness. ‘Is anybody there?’Polly hesitated. At last she answered, ‘Hello, I think I’m lost. ’A few seconds later,...
