The correct option for the sentence "We are all hungry; we ...... anything to eat since morning." is C. haven't had. Let's break down why this is the correct choice and analyze the other options. Step-by-Step Explanation

1. Understanding the Context:
2. The sentence indicates that the speakers are currently hungry and have not eaten anything since morning. This suggests a connection between the past (not eating since morning) and the present (being hungry now).
3. Identifying the Tense:
4. The phrase "since morning" indicates a time frame that started in the past and continues to the present. This is a key indicator that we need a present perfect tense verb.
5. Analyzing the Options:
6. A. hadn't had: This is the past perfect tense. It suggests that something was not done before another past action. However, there is no other past action mentioned in the sentence, and it does not connect the past to the present. Therefore, this option is incorrect.
7. B. never had: This implies that at no point in time have they had anything to eat. While it is grammatically correct, it does not fit the context of the sentence, which specifies a time frame ("since morning"). Thus, this option is also incorrect.
8. C. haven't had: This is the present perfect tense, which is used to describe an action that occurred at an unspecified time before now. It fits perfectly because it indicates that the speakers have not eaten anything from the past (since morning) up to the present moment. This is the correct answer.
9. D. didn't have: This is the simple past tense. It suggests that they did not have anything to eat at a specific time in the past. However, it does not convey the ongoing situation of hunger that connects the past to the present. Therefore, this option is incorrect.

Summary of the Correct Answer

• C. haven't had is the correct choice because it uses the present perfect tense to indicate that the action of not eating has relevance to the present situation of being hungry.

Revision Summary

• The present perfect tense is used to connect past actions to the present.
• "Since" indicates a time frame that continues to the present, requiring the present perfect tense.
• The other options either use incorrect tenses or do not fit the context of the sentence.
• Always consider the time indicators in a sentence to choose the correct verb tense.