1、After a 1980 recommendation for preventing heart attacks, aspirn used for a number of other illnesses such as cataracts, diabetes and numerous other forms of cancers.
答案:used----has been used 可是对于第一个选项还是不理解,有谁能帮忙分析一下呢?谢谢
2、Issues of prices place, promotion and product are among the most conventional concerns of marketing strategic planning, despite growing calls to expand the range of issues into day's more complex world.