On Sunday I have to go to the farm my parents.A. to helpB. helpC. helpingD. helped

问题补充：

On Sunday I have to go to the farm my parents.

A. to help

B. help

C. helping

D. helped

答案：

(答案→)A. to help

B. help

C. helping

D. helped

解析：句意：周日我必须农场帮助我的父母，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A。