In the sentence: The cast __________ together on stage before the play's premiere. The answer is a. practices
Verbs are simply known as the ‘action’ words – may it be mental, physical or mechanical. When verbs are paired with auxiliaries (helping verbs), they are known as verb phrase. These helping verbs always go first before the actual verb. Subject verb agreement requires the subject and the verb must be in agreement in terms of number. This means both the subject and the verb need to be singular or be plural.