It was the training he had as a young man made him such a good engineer.
A. what; that
B. which; that
C. that; which
D. that; what
网友回答
A. what; that
(答案→)B. which; that
C. that; which
D. that; what
解析：考查强调句和定语从句。定语从句Which he had as a young man修饰先行词the training。这里也可以用that，但是为了避免和强调句型的结构词重复，所以还是用which.第二空that是强调句型的结构词。句意：就是年轻时接受的培训让他成为如此好的工程师。