问题补充:
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. that
B. one
C. ones
D. those
解析:考查代词:句意:使她高兴的是,德拉先得到学生的信任,然后得到同事的信任。这里需要代词指代trust,that是特指前面的可数名词单数或是不可数名词,而且后面有后置定语,one是泛指前面的可数名词单数,ones是泛指前面的可数名词复数,those特指前面的可数名词复数,而且后面有后置定语,所以选A。