He became successful as a professional writer at the age of 20.9/15Rewrite the following sentences so that they have the same meaning as the original ones. He became successful as a professional writer at the age of 20.He did not succeed as a professional writer until he was 20.He did not write professionally until he succeeded at the age of 20.He succeeded as a professional writer until he was 20.He wrote professionally until he became successful at the age of 20.Giải thíchĐáp án: A Dịch: Ông trở nên thành công như một nhà văn chuyên nghiệp ở tuổi 20.