Select the most appropriate option that can substitute the underline word in the given sentence. If there is no need to substitute it, select ‘No substitution’. We are eaten our dinner before they arrived.

Correct answer: We had eaten

Explanation: The correct answer is D.✅ The sentence describes an action (eating dinner) that was completed before another action in the past ("they arrived"). To express an action completed before another past action, the past perfect tense ("had + past participle") is required. Correct sentence: ✅We had eaten our dinner before they arrived. ❌ "Are eaten" is grammatically incorrect and wrongly uses passive voice. ❌ "We is eaten" is incorrect due to subject-verb disagreement and tense error. ❌ 'We are eating" uses present continuous tense, which is inconsistent with the past context.