问题补充:
Mary is the only one of the teachers who a little Chinese because she is one of my friends who been to China.
A. know;have
B. knows;has
C. knows;have
D. know;has
答案:
A. know;have
B. knows;has
(答案→)C. knows;have
D. know;has
解析:C
解析此句包含了两个定语从句,关系代词都在从句中作主语。关系代词的单复数应与定语从句的先行词的单复数保持一致。第一个从句的先行词是the only one of the teachers,指唯一的老师,从句谓
语动词应用单数形式。第二个定语从句先行词是my friends,表示的是复数概念,所以从句谓语用复数,因此答案为C项。