To solve this sentence completion question, we need to determine the correct verb form to use with the subject "Susan" in the past tense.
The correct answer is option D:
had eaten
.
Here's a detailed explanation:
1. Subject: The subject of the sentence is "Susan," referring to a person.
2. Verb tense: Since the sentence is in the past tense, we need to use a past tense verb form.
3. Verb options:
- Option A:
have ate
- This uses the present tense "have" with the past tense "ate," which is incorrect. The verb forms should agree in tense.
- Option B:
have eaten
- This uses the present perfect tense "have" with the past participle "eaten." While this is grammatically correct, it doesn't match the past tense of the sentence.
- Option C:
has ate
- This uses the present tense "has" with the past tense "ate," which is incorrect. The verb forms should agree in tense.
- Option D:
had eaten
- This uses the past perfect tense "had" with the past participle "eaten." This is the correct verb form to use in this sentence, indicating that Susan had already eaten the cake before or during the party.
In conclusion, the correct verb form to complete the sentence is "had eaten," making option D the correct answer.