After we talked about it for a long time, he agreed to help us .
A. at an end
B. in the end
C. as usual
D. at present
网友回答
A. at an end
(答案→)B. in the end
C. as usual
D. at present
解析：短语辨析。A结束；B最后，终于；C和平时一样；D目前；现在；句意：在未命名谈论了很长一段时间以后，他终于同意帮助我们了。根据句意说明B正确。