Is that the reason he explained to all at the meeting for his carelessness in his work? Ac

Is that the reason he explained to all at the meeting for his carelessness in his work? Actually we think he is a man who is hard himself especially in work.
A. that; on
B. what; with
C. why; at
D. which; to

(答案→)A. that; onB. what; withC. why; atD. which; to解析：考查定语从句：第一空是考查定语从句，先行词是the reason定语从句中缺少宾语，用that引导定语从句，第二空考查介词be hard on对…苛刻，句意：这就是他为工作粗心在会议上解释的原因吗？实际上，我们认为他是一个人对自己尤其对工作苛刻的人。选A。

感谢回答，我学习了