阅读理解。 One day, Mr Smith is going to take a train to his hometown. When the train starts, one of his shoes falls to the ground. The train is running faster and faster and he can't pick it up. Then he quickly takes off the other one and throws it on the ground'near the fallen shoe.A little boy on the train asks him,' Why do you do that?' 'I've already lost one shoe,' Mr Smith answers. 'If a man picks them up, he may get a pair of shoes.' 1. Mr Smith is going to his hometown _______. A. by bus B. by train C. by bike D. on foot 2. What happens to the man when the train starts?  He loses _______. A. his shoes B. his watch C. one of his shoes D. nothing 3. Mr Smith can't pick up the fallen shoe because _______. A. he doesn't want to take it B. the little boy has picked it up C. he thinks it is too old D. the train has already started 4. _______ throws the other shoe on the ground. A. Mr Smith B. The little boy C. Nobody D. The man and the boy 5. Which of the following is TRUE? A. The boy wants the shoes. B. Mr Smith doesn't want the shoes. C. Mr Smith throws his fallen shoe on the ground. D. Mr Smith thinks a man may get a pair of shoes to wear if he throws the other near the fallen shoe.