He became successful as a professional writer at the age of 20.
A.He did not succeed as a professional writer until he was 20.
B.He did not write professionally until he succeeded at the age of 20.
C.He succeeded as a professional writer until he was 20.
D.He wrote professionally until he became successful at the age of 20.
A.He did not succeed as a professional writer until he was 20.
B.He did not write professionally until he succeeded at the age of 20.
C.He succeeded as a professional writer until he was 20.
D.He wrote professionally until he became successful at the age of 20.
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