We were not surprised at ______, for he had worked so hard.

We were not surprised at ______, for he had worked so hard.
A、what has he achieved
B、what he had achieved
C、that what he had achieved
D、that he had achieved
【正确答案】：B
【题目解析】：宾语从句要用陈述句的语序，what在从句中做宾语，所以选B。本句的意思是：“我们对他所取得的成功并不感到惊奇，因为他非常努力。”