(2013·高考辽宁卷)To her joy，Della earned first the trust of her students and then of her colleagues.
A. that
B. one
C. ones
D. those
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(答案→)A. that
B. one
C. ones
D. those
解析：选A。句意：让Della高兴的是，她首先赢得了学生们的信任，之后又赢得了同事们的信任。空格处需用代词代替the trust，因为trust为不可数名词，故选A项。one指代单数可数名词，为泛指，其复数为ones。that可以指代上文出现的不可数名词或单数可数名词，表特指，其后常有修饰语，其复数为those。