Correct Answer:
C. will be
This question assesses your knowledge of verb tenses, specifically the future continuous tense.
- Option C: will be is the correct choice. The phrase "next Sunday at 7 PM" indicates a specific point in the future when an action will be ongoing. The future continuous tense (will be + verb-ing) is used to describe an action that will be in progress at a particular time in the future. Therefore, "She will be waiting" accurately conveys this meaning.
- Option A: be is incorrect as it is the base form of the verb and cannot be used directly after a pronoun in this context without an auxiliary verb.
- Option B: has been is incorrect. This is the present perfect continuous tense, used for actions that started in the past and continue up to the present, or have just finished. It does not fit the future context of the sentence.
- Option D: is is incorrect. This is the present continuous tense, used for actions happening now or definite future plans, but "will be waiting" is more precise for an action ongoing at a specific future time.