题目___Listening aid___ does him a great favor .A. 主语B. 宾语C. 表语D. 定语E. 宾语补足语F. 状语___Listening aid___ does him a great favor .A. 主语B. 宾语C. 表语D. 定语E. 宾语补足语F. 状语题目解答答案A. 主语