15.____ most school teachers were men,but today there are more women than men.

题目

15.____ most school teachers were men,but today there are more women than men.
A.At a time B.At times C.At one time D.At no time
please explain

答案

C
A、At a time是指一次,比如说A mother panda has only one baby at a time.熊猫妈妈一次只生一个宝宝
B、At times意思是 有时,等于sometimes
C、At one time意思是指 一度、从前,这里也就是 曾经的意思,根据语境,故选C
D、At no time指的是 从不,相当于 never
所以,应该选C