Read the following passage and choose the best answer for each blank

Most American television programs (1) ........................... produced in Hollywood. Each year, proposals (2) ........................ new television serials are submitted to network executives for consideration. Only (3) ........................... are accepted-often those linked to a highly (4) ....................... performer or producer.

The (5) ....................... .phase is the writing of scripts. (6) ................ scripts are reviewed by the networks and a small (7) ................. is selected to be developed into pilot programs. (8) ...................... the program executives like a pilot program (9) .................. it gets good rating in a trial telecast, the pilot eventually (10) ............. produced as a regularly scheduled program.

 (1) .......................

• A. 
  is
• B. 
  are
• C. 
  were
• D. 
  has been