题目内容：

Mary does ___ writing than speakingA.good at B.well in C.better at D.better in

优质解答

答案：选D
即：Mary does better in writing than speaking.
解析：do well in=be good at 擅长,在...方面做得好,是固定词组,而且本句是形容词比较级的句子,所以用比较级
翻译：玛丽写得比说得好.
有不明白的请继续追问,