It was the training ( ) he had as a young man ( ) made him such a goog engineerA.what that b.that,what c.that,whiah d.which,that

B

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本题应该选择D项
主句应该是The training made him such a good engineer (good打错了)
he had as a young man 作定语 先行词为training指物 关系代词可以用that/which

再看句式It is/was+被强调部分+that 这是属于强调句型的 必须要使用 that
这一句强调主语

下面是有关强调句型的 你可以看一下
1. 陈述句的强调句型
　　It is/ was + 被强调部分（通常是主语、宾语或状语）+ that/ who（当强调主语且主语指人）+ 其他部分。

　　例子 It was yesterday that he met Li Ping.

2. 一般疑问句的强调句型

　　同上，只是把is/ was提到it前面。

　　例子 Was it yesterday that he met Li Ping?

3. 特殊疑问句的强调句型

　　被强调部分（通常是疑问代词或疑问副词）+ is/ was + it + that/ who + 其他部分？

　　例子 When and where was it that you were born?

　　4.not … until … 句型的强调句

A. 句型为：It is/ was not until + 被强调部分 + that + 其他部分

　　普通句：He didn't go to bed until/ till his wife came back.

　　强调句：It was not until his wife came back that he went to bed.

希望我的回答能够帮到你

选D.不要被楼上两位误导.翻译：年轻时的所得到的训练让他成为了如此优秀的工程师.第一空：定语从句.the training 是先行词,which做he had 的宾语,因而也可以省略which.第二空：这里才是强调句型.It was ...that...,...

B 前面是强调句，用that，后面是用what代替the training。