Ngữ Pháp và Từ Vựng
Not until .........................
A. I approached the flat that I realized that it was completely empty.
B. did I approach the flat that I realized that it was completely empty.
C. I approached the flat did I realize that it was completely empty.
D. did I approach the flat I realized that it was completely empty.
![](https://image.exam24h.com/public/2019/04/27/1052_7aac21b01db4e7fe0a14cbd404824ec0_300x300.jpeg)
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