17. Jack has a lot of homework to do, ________ he has no time to play.

       A. because             B. but                           C. or                            D. so

18. –I want to see the movie Kung Fu Panda. Do you know the ________ of the ticket?

– Yes. Fifteen dollars.

A. number             B. kind                         C. price                        D. name

19. – Excuse me! ________ can I get to the park?

   – Walk along the street and turn left.

       A. How                 B. Which                      C. When                       D. Why