单选题 He took ______ as to what he should do.
   A) his friend's advise                 B) his friend's advices
   C) an advice of his friend               D) his friend's advice
【正确答案】 D
【答案解析】take one's advice意为“接受忠告”，advice意为“忠告，建议”时，为不可数名词。