1.very--well (sth.be well worth doing 固定短语,"某事很值得做")
2.referring--referred (指"会上被提及的那件事",表示被动,因此应该用过去分词短语referred to作定语,修饰the matter.)
3.improve--improving (be devoted to doing sth.固定短语,"致力于做某事",其中的to为介词,故后面应接动名词形式)
4.change--changed (get changed 固定短语,"更衣/更换衣服")
5.have--has ("more than one+名词单数"作主语时,谓动用单数)
6.at--upon (look down upon 固定短语,"看不起,瞧不起")
7.with--into (argue sb.into doing sth.固定短语,"劝某人做某事")
8.After--Only (only开头的句子要用倒装句,而after开头的句子不用倒装句;由句中的can the problem be solved可知是倒装句,故After改为Only)
