A1. a big headache令人头痛的事情2. a fraction of 一部分3. a matter of concern 焦点4. a series of 一系列,一连串above all 首先,尤其是5. absent from不在,缺席6. abundant in富于7. accou
【政府类】 Some people think the government should ban dangerous sports and someothers think it is a freedom to choose the activities we want to. Discuss bothview and give