试题要求：
Paragraph③: _____.
试题解析：
答案：D
解析：
第三段由表示顺序的词“after...than..., start with...and eventually...”,及关键词“In the solution of the remaining difficulties”可知，该段主要描述解决问题的步骤和方法。
考点：概括段落大意和补全句子,2014.4
Paragraph③: _____.
第三段由表示顺序的词“after...than..., start with...and eventually...”,及关键词“In the solution of the remaining difficulties”可知，该段主要描述解决问题的步骤和方法。