You shouldn.t have written in the _____ since the book belongs to the library. A. interval B. border C. margin D. edge
出自:西安交通大学--英语三

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块