He learned English for three years. Then he moved to London. A. After he had moved to London, he learned English for three years. B. By the time he moved to London, he had learned English f
He learned English for three years. Then he moved to London.
A. After he had moved to London, he learned English for three years.
B. By the time he moved to London, he had learned English for three years.
C. After he moved to London, he had learned English for three years.
D. By the time he had moved to London, he learned English for three years.