✔ Correct Answer: D. Until he came to the United States, he didn't know how to cook.

The correct answer to the question “Choose the sentence which is grammatically correct: Until, he came to United State, he didn't knew to cook.” is Until he came to the United States, he didn't know how to cook.. This question belongs to Grammar Concepts & Terms in English. Practice the related questions below to master this topic for your FPSC, PPSC and NTS tests.