The belief in fairies have existed from earliest times,and the literature of many countries includes tales of fairies and their relationship to humans.
答案: have existed-----has existed
Salt lake city,Utah's capital and largest city,is industrial and banking center.
Alough all sedimentary rocks contain iron, but the deposits that are richest in iron consist predominantly of minerals such as iron oxdies, carbonates,silicates,and sulfides.
答案:but the deposits ---------the deposits 但是richest前面为什么没有the呢?