ten years later ,Tom ______ artist

对。选A
如果 选 became ,一定要写成 became an artist，冠词不能少的。
turn可以不用冠词的

D Tom became an artist,少了an

肯定不选A, 要用artist，前面一定有an,选哪一个都是少an.
turn into表示“变成”才行，单用turn,后面接名词是不行的。
单用turn后面就要接形容词Tom turn artistic.

题目没有an,题目就错了

D Tom became an artist,
十年之后，汤姆成了一位艺术家

A
绝对是A,如果是 became ,要写成 became an artist,而.turn可以省略an

A

B，C，D排除，賸下A，选A