Dick is the only one of the teachers who Chinese. He is one of Mary’s friends who been t

问题补充：

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：

A. know; have

(答案→)B. knows; have

C. know; has

D. knows; has

解析：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。