问题
选择题
To her joy, Della earned first the trust of her students and then ____ of her colleagues.
A．that
B．one
C．ones
D．those
答案
答案：A
题目分析:句意：使她高兴的是，黛拉首先赢得了学生们的信任，然后又赢得了她同事的信任。that指代不可数名词；one指代单数可数名词；ones指代复数名词，是泛指概念；those指代复数名词，是特指概念。此句中被替代词trust是不可数名词，故答案选A.。