题目

I hurried to the accident spot only to find two dogs happily enjoyed what was left ____the cake and meat. 答案：C 本题实际语序应该是：what of the cake and meat was left.类似用法还有Nothing remained of the house after the flood. 解析: ：A. for  B. with   C. of   D. to苹果和梨每千克的售价分别是a元和b元，各买m千克。（a＜b）（1）am表示（_____________）。（2）bm表示（_____________）。（3）（a＋b）m表示（_____________）。（4）（b－a）m表示（___________________）。