21、As we know, the great American writer Jack London was often in need of money when be began to write his books .tie worked very hard but it did not help him.

Once he promised a New York magazine to write a story ,but he was busy at that time and could not keep his promise .The boss of the magazine wrote letters to Jack London several times to ask him to send the story .At last he went to Jack London's room and left him a note.

      "Dear Jack London, if I don't get the story in twenty-four hours, I will come to your room and kick（踢）you downstairs, and I always keep my promise ."

    Jack London read the note and answered "Dear Dick , if I could do my work with my feet like you ,I could keep my promise ,too ."

（   ）1．Jack London _____ when he began to write his books.

      A．was not very busy                                      B．didn't have enough money

C．didn't work hard                                 D．didn't need any money

（   ）2．The boss of the magazine wrote letters to _____, Jack London."

      A．the boss                    B．the writer            C．his friend                   D．the officer

（   ）3．Jack London's answer meant he ______ do his work with his feet.

      A．had to               B．could                C．must               D．couldn't