_______ our classroom once a week is necessary A.Cleaning B.Clean C.Cleaned D.To clean 我觉得是A但是答案给了D 说是不定式做主语,

分类: 作业答案 • 2021-12-19 11:47:22

问题描述：

_______ our classroom once a week is necessary A.Cleaning B.Clean C.Cleaned D.To clean 我觉得是A
但是答案给了D 说是不定式做主语,

答