Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now listen to the passage. What did the speak want to tell us in this passage
A．One can benefit a lot from working with his father. B．Manual laborers should n’ t be looked down upon. C．One should always do his job earnestly. D．Teenagers tended to be careless.