-What's the matter?-They said I should not be allowed ________ here. They don't allow ________ in the waiting room.A.smoking, to smokeB.to smoke, smokeC.to smoke, smokingD.smoking, smoking
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C解析allow sb．to do=let sb．do，allow后面接表示人的名词或代词作宾语时，或用于被动语态时，后面必须接动词不定式；当allow不带人称代词或名词时，后面的动词必须用-ing形式。