InMarch,thousandsoftreesarepreparedforpeopletoplant 国语站 题库 1.07W 大中小设置文字大小 问题详情:In March, thousands of trees are prepared for people to plant ______ in the forest zoo. A. of free B. for free C. of freely D. for freely【回答】B知识点:介词题型:选择题 TAG标签:#