21. —Stay a bit longer, please. It’s been such _______ fun having you here.

   —Thank you, but I’ve got _______ early start tomorrow morning.

   A. / ;  the      B. a; an       C. /; an      D. the; an 

22. All of us want very much to see these amusing movies, especially ___you referred to just now.

  A. any       B. it        C.  the one      D. one