Question

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

A. that   

B. one   

C. ones 

D. those

Answer 1

 A。本题考查代词辨析。A. that特指，相当于the+单数可数名词或the+不可数名词 B. one相当于a/an+可数名词单数 C. ones指代可数名词复数，表泛指 D. those=the ones，指代可数名词复数，表特指。根据句意，这里指“赢得同事的信任”，即the trust of her colleagues，显然是特指。故选A。

【句意】使黛拉高兴的是，她首先赢得了学生的信任，接着又获得了同事的信任。