I will not speak unless _______.
A．I will be asked toB．a(chǎn)skedC．a(chǎn)sked toD．I am asked
C
考查狀語從句的省略，句意：我不會說話除非要求被說。根據(jù)語境應用過去分詞asked to     ，前省略了I am ，后省略了speak，所以選C。
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