We don’t want to leave early but they _.

A. Want
B. Had
C. For
D. Do

🧠 Explanation:

The sentence “We don’t want to leave early but they do” uses “do” correctly. Knowing this helps students improve English grammar, ensuring clear sentences. Understanding auxiliary verbs is useful for essays, exams, or conversations in school. This skill is key for English classes, helping students express contrast accurately. Learning correct grammar enhances communication, making it easier to express differences in academic projects or daily scenarios where precise language improves clarity and professionalism.