The young boy often helps his father _______ machines. A. fix B. fixes C. to fixing D. fixing
2022-10-31 10:21:42 12次 牛津英语7B Unit2选择题练习 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
The young boy often helps his father _______ machines.
A. fix B. fixes C. to fixing D. fixing
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