How kind you are!You always do what you canme.A. helpB. helpingC. to helpD. helps

问题补充：

How kind you are!You always do what you canme.

A. help

B. helping

C. to help

D. helps

答案：

A. help

B. helping

(答案→)C. to help

D. helps

解析：句意：你太好心了！你总是尽你所能的帮助我。不定式做目的状语表示具体的将要进行的动作，结合语境可知选C。