V:
In these sentences, each one has four underlined words or phrases marked A, B, C, and D. Choose the one word or phrase that must be changed in order for the sentence to be correct.
Trả lời câu hỏi dưới đây:
Not until I was on my way to the airport that I realized I had left my passport at home.
Đáp án là C. that I realized => did I realize