Transition words and phrases are necessary because they ______.
A.connect sentences and paragraphs by showing relationship between them
B.directly show the main ideas
C.indicate the supporting information
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