He decided not to say anything at the meeting unless.A. asking to B. to ask to C. asked t

He decided not to say anything at the meeting unless .
A. asking to
B. to ask to
C. asked to
D. ask to

A. asking to B. to ask to (答案→)C. asked to D. ask to解析：考查非谓语动词和省略。He与ask之间是动宾关系，即“让他说”，应该用被动，排除A、B、D；句意：他决定在会议上保持沉默，除非被邀请才讲话。unless后省略了he was asked to say something。故选C。

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