问题
选择题
Dick is the only one of the teachers who ____ Chinese. He is one of Mary’s friends who _____ been to China.
A．know; have
B．knows; have
C．know; has
D．knows; has
答案
答案：B
在定语从句中，one of + 复数名词，前有the （only）时，从句的谓语动词用单数；前没有the （only）时，从句的谓语动词谓语动词用复数。句意：迪克是老师们当中唯一一个知道汉语的老师。他是玛丽的去过中国的朋友中的一个。所以选B。