His sister usually helps him________his homework． A．doing B．do C．does D．to doing
2022-12-28 23:25:00 112次 2015年人教版初中英语八年级下Unit 2 Section A练习卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
His sister usually helps him________his homework．
A．doing
B．do
C．does
D．to doing
本题链接：
