31. The Transrapid Maglev can reach Pudong from Longyang Station within half an hour. ____, it runs very fast.

A. After all  ¡¡¡¡¡¡ B. In other words  C. As a result    D. At last 

32. --- How long ____ at this job?

  ---Since 1999.

   A.were you employed                              B. have you been employed

  C. had you been employed                        D.will you be employed