Fill in the blank with a suitable verb form:
A: Were they playing tennis?
B: No, they ___________.
A verb is used to express an occurrence, action, or state. It is the grammatical centre of the predicate in a sentence.
An auxiliary verb is a verb which is used in the formation of tenses, moods, tones, etc.
Option B is correct as were indicates the use of past continuous tense.
The other options are wrong as no other tense can be used here.
The correct answer is B) weren't