Thank you very much for the trouble you have taken me with my English.A. helpingB. to hel

问题补充：

Thank you very much for the trouble you have taken me with my English.

A. helping

B. to help

C. help

D. helped

答案：

A. helping

(答案→)B. to help

C. help

D. helped

解析：考查短语：take the the trouble to do 不辞辛苦做某事，题中含有一个定语从句，the trouble是先行词，后面的从句中you have taken后缺少宾语，省略了关系代词which/that，句意：非常感谢你不辞辛苦的帮助我的英语。所以选B。