Mr Wang gave us＿＿＿＿＿on how to improve our English．
A. so good an advice
B. a good advice
C. some good advices
D. a piece of good advice
网友回答
A. so good an advice
B. a good advice
C. some good advices
(答案→)D. a piece of good advice
解析：advice 表示“忠告；建议”，为不可数名词，指数量时，常与a piece of连用。