The music .A. sound beautifulB. sounds beautifullyC. sound beautifullyD. sounds beautiful

问题补充：

The music .

A. sound beautiful

B. sounds beautifully

C. sound beautifully

D. sounds beautiful

答案：

A. sound beautiful

B. sounds beautifully

C. sound beautifully

(答案→)D. sounds beautiful

解析：主语The music是不可数名词，系动词要用单数，排除A,C；sound听起来，是系动词，用形容词作表语。所以选D。