1 A: Were. (visit) you the doctor at 5 o'clock yesterday? B: No, I wasnt (be) at the hospital.

A: Did you visit the doctor at 5 o'clock yesterday? B: No, I wasn't at the hospital. *Explanation* A: The sentence is in the past simple tense because of the word 'yesterday'. The correct form of the verb 'visit' in the past simple tense is 'did visit'. Since it is a question, we use the auxiliary verb 'did' before the subject 'you'. B: The sentence is in the past simple tense. The correct form of the verb 'be' in the past simple tense is 'was' or 'were'. Since the subject is 'I', we use 'was'. So, the complete sentence is 'I was not' or 'I wasn't'.