Mary who newly came to the class has already earned both the trust of her classmates an

问题补充：

Mary, who newly came to the class, has already earned both the trust of her classmates and of her teachers.

A. one

B. ones

C. that

D. those

答案：

A. one

B. ones

(答案→)C. that

D. those

解析：考查代词。句中的that代指不可数名词the trust。句意：新来到班级的玛丽已经她同学和老师的信任。故C正确。