Sally sings pretty and she is also at dancing.A . well; well B.good; good C.well; good

问题补充：

Sally sings pretty and she is also at dancing.

A . well; well B.good; good C.well; good

答案：

解析：well一般用作副词，修饰动词，意思是很好地，满意地。Good用作形容词，意思是好的，不错的。句意：萨拉唱的相当好，并且她也非常善于跳舞。结合语境可知前文用副词修饰动词sings，下文用形容词做is的表语，故选C。