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　　31evidently, something drastic needs to be done about such a costly problem

　　显而易见，要采取猛烈的措施来对付这个代价不菲的问题

　　32、it is of great help for sb to do sth and to do sth + 状语从句

　　it can be imagined that …

　　33简单句+具体的好处/坏处，which, in the long run do great good/harm to ..

　　34___ is growing at a startling pace.

　　35What lies behind this disturbing issue deserve most attention.

　　36___ is surely one explanation.

　　37 主语 make it possible for sb to do sth without doing sth

　　38 sth/doing sth provides a new platform on which + 并列句

　　39 ——————is + adv motivated and opens up opportunities for sb to do sth