[解析]
51.thought,考查名词,the same后跟名词,表示"想法".
52.up,考查动词短语,give up doing sth放弃做某事.
53.beautiful,考查形容词,根据句意:她既年轻、漂亮又学识渊博.因此填写beautiful作表语.
54.alone,考查形容词,作状语说明主语的情况用形容词alone,表示"一个人".
55.happily,考查副词,修饰动词用副词.
56.because,考查连词,根据上文我的心里想法,得出答案.因此填写because.
57.success,考查名词,get close to,to为介词,后跟名词.
58.to study,考查不定式,decide后跟不定式作宾语.
59.with,考查介词,help sb with sth帮助某人做某事.
60.going,考查固定搭配,keep sb doing sth让某人一直做某事.