假定英语课上老师要求同桌之间交换修改作文，请你修改你

      假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处，每处错误仅涉及一个单词的增加、删除或修改。

      增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

      删除：把多余的词用斜线（＼）划掉。

      修改：在错的词下划一横线，并在该词下面写出修改后的词。

      注意：1. 每处错误及其修改均仅限一词；  2. 只允许修改10处，多者（从第11处起）不计分。

  When I first learned to wrote in English , I ran into much difficulties. The main problem was that I always thought in Chinese and tried to translate anything into English. My teacher advised me to keep my diary. I followed her advice and should put down 100 words or so each day.

   Soon I began to enjoy talk to myself as I was learning to express me in simple English. One day I wrote a story and showed to my teacher. He liked it very much and reads it to the class. All said that the story was a good one. Their word were a great encouragement to me. 

61. warmer   句中出现than，要用比较级。

62. During  during much of the year 在一年的大多数时候

63. them   讲的是Polar bears ，这里需要用宾格them。

64. threatens  that引导的定语从句，缺少谓语，要用threat的动词threaten, 主语是danger，要用threatens。 

65. since   since+点时间，用现在完成时。

66. survival  their修饰名词。

67. a  单数名词前，表泛指，用a。

68. Without 没有冰，他们无法生存。

69. But   一些极地冰的融化和重新冻结是很自然的，但是在一个更暖和的世界,这些周期

加快了。

70. when当熊不积极打猎时，这些额外的脂肪就会被用掉。