To her joy Della earned first the trust of her students and of her collegues.A. thatB. one

问题补充：

To her joy,Della earned first the trust of her students and of her collegues.

A. that

B. one

C. ones

D. those

答案：

A. that

B. one

C. ones

D. those

解析：句意：令她高兴的是，德拉首先赢得了她的学生的信任，还有同事的信任。此处填that，代替前文的the trust，one应代替a +单数可数名词；ones代替前文的可数名词复数；those代替前文的the +可数名词复数。

【考点定位】考查代词。