I will not speak unless .A. I will be asked toB. askedC. asked toD. I am asked

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A. I will be asked to
B. asked
(答案→)C. asked to
D. I am asked
解析：考查状语从句的省略，句意：我不会说话除非要求被说。根据语境应用过去分词asked to     ，前省略了I am ，后省略了speak，所以选C。