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1. A. It was not until the third year that I talked to foreigners.
2. B. It was not until 10 O’clock that the boy next door stopped singing.
3. C. It was not until Sunday that the farmer finished his work.
4. A. It was not until I was fifteen that I knew how to play the guitar.
5. A. It was not until his mother returned home that he did his homework.