语法与词汇 I only know the man by _____ but I have never spoken to him.
【正确答案】 C
【答案解析】句意：我只是跟那人见过面，但从来没有说过话。know sb. by sight和某人面熟（并不相识） 。By chance偶然。know sth. by heart熟记。know sth. by experience由经验而学得……。