My parents asked me my sister with her schoolwork.A. helpB. to helpC. helpingD. helped

问题补充：

My parents asked me my sister with her schoolwork.

A. help

B. to help

C. helping

D. helped

答案：

A. help

(答案→)B. to help

C. helping

D. helped

解析：句意：我的父母要求我在她的学业上帮助我的妹妹。Ask后接带to的不定式做宾语补足语，结合语境状况选B。