When about the source of his ine, he hesitated for a moment, obviously not willing to give us a direct answer.
A. asked
B. asking
C. being asked
D. having asked
网友回答
(答案→)A. asked
B. asking
C. being asked
D. having asked
解析：考查状语从句的省略。当从句主语与主句主语一致，并且从句主语后动词为be动词时，可以省略从句的主语与be动词。此题从句省略了he was.