When Polly left home that morning, the city was covered in grey mist. At four o"clock, Polly left work and stepped out , the man replyed, take an underground train to green park,然后写A tall man那一段的第一句,Footsteps的第一句和第四行,第五行还有最后一句,The helpful stranger 的第三句,第五句,第六句,第三页的第三行,然后写The man said he could seng her a hand,"thank you so much," said Polly. The man said there may be more people lost today ,and I would like to help them