Why do you look so upset? I had to take over his work.A. His being awayB. He was

问题补充：

--- Why do you look so upset?

--- , I had to take over his work.

A. His being away

B. He was away

C. He had been away

D. He being away

答案：

A. His being away

B. He was away

C. He had been away

(答案→)D. He being away

解析：考查独立主格结构。当分词做状语的时候，如果分词的逻辑主语与主句的主语不一致的时候，可以在分词前面直接加上改分词的逻辑主语。根据上下文可知分词短语being away的逻辑主语的he,后面句子的主语是I，两者不一致，所以在being前面加上逻辑主语。句意：—为什么你看上去如此难过？—因为他离开了，我不得不负责他的工作。故D正确。