[解析]
61.if 考查连词.根据句意:因为如果你相信你能做到,那么你就真的会做到.用连词if引导条件状语从句.
62.The 考查冠词.belief前用定冠词the表示特指Believe that you can do it under any circumstances这个信念.
63.exactly 考查副词.know是动词,要用副词修饰.
64.responsibility 考查固定搭配.take responsibility意为"履行职责",是因搭配.
65.successful 考查形容词.experiences是名词,要用形容词修饰作定语.
66.believing 考查动名词.分析句子结构,句中用动名词短语believing you can do it作表语.
67.of 考查固定搭配.be capable of意为"有能力,能够",是固定搭配.
68.determined 考查过去分词.effort是名词,用形容词化的过去分词作表语,determined意为"坚定的,坚决的".
69.it 考查代词.it指代上文中的your life.
70.will have 考查动词时态.(条件)祈使句+and/or+(结果)简单句,此句型为"条件与结果"并存的句式,其中的祈使句可转化为if条件句,主句用一般将来时态.