2. 职称英语
  3. Only after they had performed hundreds of experiments did they succeed in (solve

Only after they had performed hundreds of experiments did they succeed in (solve

游客2023-09-25  67
问题 Only after they had performed hundreds of experiments did they succeed in (solve) ______the problem.
选项
答案 solving
解析 本题考查动名词的用法。英语中介词后需接动名词，动名词由动词加-ing构成，起名词的作用。本题中，solve的动名词形式solving作介词in的介词宾语，故填solving。
转载请注明原文地址:http://tihaiku.com/zcyy/3044487.html
相关试题推荐
随机试题
最新回复(0)