Roger had just walked into his office and that was when he was told that his plan had fin

问题补充：

Roger had just walked into his office and that was when he was told that his plan had finally been approved. Which of the following can be instead of the underlined(划线的) part to make the sentence better.

A. and then they told him

B. when it was learned by him

C. and then he learned

D. when he learned

答案：

A. and then they told him

B. when it was learned by him

C. and then he learned

(答案→)D. when he learned

解析：考查when的用法：when当…时候，也可以是“这时”相当于at that time，可以构成had done…when…这个固定结构，意思是：刚刚做完…这时…,用when更加简洁。句意：Roger刚刚走进办公室，这时他知道他的计划最后通过了。选D。