题目

 —I don’t understand why so many people risk _____ their lives by stealing , or even killing someone. —Well, sometimes, poverty and desire can drive people to do anything once they are out of control. A. to be lost     B. to lose      C. being lost     D. losing 答案：D下列关于有机化合物的说法正确的是（　　）A．只有在生物体内才能合成的物质B．所有含碳元素的物质C．有机化合物都能燃烧D．有机物都是含有碳元素的化合物