单选题 Green plants take in carbon dioxide and give off oxygen in a food-making process called photosynthesis.
【正确答案】 D
【答案解析】[解析] donate“捐赠，赠与”；check“检查，核对”；withhold“使停止，保留，抑制”；release“释放”划线单词give off的意思是“释放”，与release词义相近，故本题选D。