题目

The first guest to his restaurant can enjoy the meal without paying money.（保持句意基本不变）The first guest to his restaurant can enjoy the meal ________ ________. 答案：【答案】for free 【解析】句意：他餐馆的第一位客人不用付钱就可以享用这顿饭。短语“without paying money（不用付钱）”意思是“免费”，for free：免费地。故答案为（1）for（2）free。4、已知x-y=6，xy=-4，則x2+y2=28．