as she is, she has turned professional writer.A. Teenager; 不填B. A teenager, a C. Teenager

as she is, she has turned professional writer.
A. Teenager; 不填
B. A teenager, a
C. Teenager; a
D. A teenager; /

(答案→)A. Teenager; 不填B. A teenager, a C. Teenager; a D. A teenager; /解析：考查冠词。句义：尽管她是一个青少年，但是她已经是一名专业作家。把握关键词as尽管，虽然构成的倒装句：名词+ as +主语 + 谓语动词，如果名词是单数名词，不带冠词，所以排除B D ，第二个空把握关键词turn 成为，加职业名词不带冠词，排除C ,所以A正确。

哦，回答的不错