Thank you for me a lot.A. helpB. helpsC. to helpD. helping

问题补充：

Thank you for me a lot.

A. help

B. helps

C. to help

D. helping

答案：

A. help

B. helps

C. to help

(答案→)D. helping

解析：本题中的介词for后应跟动名词helping，故本题选D。