Since we……….received by the governor, we were all dressed formally and it was a great disappointment when the audience was cancelled.A. had been          B. have been C. were to beD. would have been

The correct answer is C. "were to be".

Here's why:

A. "had been" - This is past perfect tense, which is used to talk about something that was completed in the past before something else happened. This doesn't fit the context of the sentence.

B. "have been" - This is present perfect tense, which is used to talk about something that started in the past and is still happening now. This doesn't fit the context of the sentence.

C. "were to be" - This is the correct answer. This form is used to talk about plans or expectations in the past that may not have happened. In this case, the group was expecting to be received by the governor, but the audience was cancelled.

D. "would have been" - This is used to talk about something that didn't happen in the past, but it doesn't fit the context of the sentence because it implies a condition that wasn't met.