in the end/at the end/by the end区别

题目

in the end/at the end/by the end区别
_______,he decided to go abroad for further study.
A.in the end B.at the end C.by the end D.at the end of

答案

at接的都是某点,比较小,细节 at the end表示在终点,……的结尾
in the end 终于,最后,副词短语,可以放在开头,用逗号隔开,这道题表示最后,他终于决定出国进修了,所以选择A
by the end 到……为止,常和of连用,表示一种完成,常用于完成时态