问题详情：
(2011年龙岩检测)At 13，Samuel received a training course in drawing for three years，________he got a good opportunity for further development.
A．after that B．after which
C．after it D．after this
【回答】
解析：选B。考查定语从句。after which he got a good opportunity for further development是非限制*定语从句。
知识点：未分类
题型：未分类
