It was the training he had as a young man made him such an excellent speaker.
A. which; which
B. which; that
C. that; which
D. that; what
网友回答
A. which; which
(答案→)B. which; that
C. that; which
D. that; what
解析：考查复杂句：第一个定语从句，先行词是the training ,关系代词在从句中充当had的宾语。
第二个是强调句型It was +强调部分+that...句意：是他在年轻的时候做的训练使他成为这么优秀的演讲者。选B。