题目内容：

阅读短文，从方框中选择适当的动词，并用其适当形式填空。有的需要加助动词或不定式符号。（每词限用一次）

  have   knock    happen   call   work   

Last weekend, Jim went to see a film. It was about a boy 1___________Bob. Bob lived with his parents in a small town. They were very poor. Bob’s father 2___________ in a market for a long time. Bob wanted 3___________a bike very much.

One day, an old man 4___________down by some boys, and they ran away. Bob went to help the old man. The old man gave him a magic book and told Bob to make a wish before opening it.

Can you guess what 5___________ in the end? Please watch the film and find out!