题目内容

When ____ about the source of his income, he hesitated for a moment, obviously not willing to give us a direct answer.
A.askedB.askingC.being askedD.having asked
A
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.
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