[QA] By the time we _______ to the train station, Susan _______ for us for more than two hours.

Question:

By the time we _______ to the train station, Susan _______ for us for more than two hours.

• A.
  got/ had been waiting
• B.
  got/ was waiting
• C.
  will get/ has been waiting
• D.
  get/ will wait