The head engineer apologized for_______to attend the ceremony.

The head engineer apologized for_______to attend the ceremony.

题目
The head engineer apologized for_______to attend the ceremony.
A.his not being able B.his not able C.his being not able D.not his able
请说明理由谢谢。
答案
A
凡是动词非谓语形式的否定形式not都放在v.+ing前面
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