Being a tough guy, he has perfect control of his won ______.
 
【正确答案】 C
【答案解析】 名词词义辨析。句中tough形容的是一个人的品质、情感,所以空格应填入与此同类的形容词。选项中,sentiment意为“情感,感情”,符合句意。故答案为C。