Heisahard-workingboy.Hekepton()hishomework()A.doing;alldayB.todo;allthedayC.doing;allthedayD.todo;allday
2021-07-27 69次 反馈错误 加入收藏 正确率 : 100%
题目内容：
He is a hard-working boy.He kept on( )his homework( )
A.doing;all day B.to do;all the day C.doing;all the day D.to do;all day
优质解答
A
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