The headlights of the approaching car were so______that the cyclist had to stop riding.
【正确答案】 D
【答案解析】各项的意思是：gleaning拾落穗，拾遗； staring目不转睛的，显眼的；gleaming闪烁的，隐约地闪现；dazzling晃眼睛的，光彩夺目的。根据句意判断，答案为D。