单选题 Since we can't hear you at the back of the hall, you'll have to ______ your voice.
A. lift B. increase C. speak up D. raise

【正确答案】 D
【答案解析】[解析] raise one's voice“提高嗓门”；speak up“大声说”，不再接voice；lift和increase不与voice搭配使用。