Paragraphs may vary in length, but in general, they should have ______.
A.a beginning sentence
B.some middle sentences
C. Both A and B
出自:国家开放大学婚姻家庭法学

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