Polly never foresaw she would one day be helped by an old blind man.At four o'clock that afternoon , she left work and 1. (step) out into the street , ready to go home in King Street.Due 2. the thick fog , she had to take the Underground to Green Park , then to her house.As it was so foggy that she felt a bit 3. (frighten) . On the train she had a feeling 4. she was being watched by a tall man. 5. (walk) towards Park Street , she heard footsteps and felt a man's rough hand brush her cheek.Her heart was beating with fear.Therefore , when she heard another man's 6. (footstep) , she wanted to run , but fear held her still.Much to 7. (she) joy , this time an old man carrying a stick reached out his hand, held her hand 8. (firm) , and led her to her street , chatting all the way. In the end , Polly got 9. (know) that the old man was blind! Why did he do that on such 10. day ? The old man wanted to pay back the help he received when it was sunny.Polly felt so warm! Everyone needs help and should pay it back.