_______he succeeded in doing his experiment.
问题描述：
_______he succeeded in doing his experiment.
A.At the end B.By the end C.In the end D.Till the last 求详解
答
选C.
in the end 最终.
at the end of sth 在...的结尾.
这里应该是最终他成功了,所以选in the end额by the end和till the last 呢by the end一般与时间连用，比如 by the end of 2012，用过去完成时态。till the last 表示一直到最后。用在句尾，比如：We kept fighting till the last。