单选题 If you don't ______ smoking, you'll never get better.

【正确答案】 D
【答案解析】[解析] A“give off”意为“发出，冒出”；B“give out”意为“发表，用完”；C“give over”意为“交托，留出”；D“give up”意为“放弃，交出”。D为正确答案。