题目

—What do you want, Sir?— I want a toy car. A . to buy B . buy C . buys D . buying 答案：A抽屉里有尺码相同的2双黑袜子和1双白袜子，混放在一起，在夜晚不开灯的情况下，随意拿出2只，它们恰好是颜色相同的1双的概率是_________．