Mary is the only one of the teachers whoa little Chinese because she is one of my friends

问题补充：

Mary is the only one of the teachers whoa little Chinese because she is one of my friends whobeen to China

A. knows have

B. knows have

C. know to

D. know has

答案：

A. knows have

(答案→)B. knows have

C. know to

D. know has

解析：可联系答.案.网客服索取。