题目

Gone forever ____ when we used foreign oil. A. the days are B. the days were    C. are the daysD. were the days   答案：Cgone are the days when…. 是一个句型：….的日子已一去不复还了。在横线里填上“＜”“＞”或“=” 4.58×1.2＞＞4.58 5.5×0.4＜＜5.5 12.6÷0.28＞＞12.6 26.2÷6.2＜＜26.2．