题目

-do you know               ?-sorry,I don't know.  A.who broke the window.   B.where shall we go. C.when did the rain stop.    D.who will kate go shopping with. 答案：A一种商品先降价10%，后来又提价10%，现价和原价相比A.提价B.不变C.降低D.难以判断