Silver is the best conductor of electricity, copper _______ it closely.
A、followed
B、following
C、to follow
D、being followed
出自:安徽大学-会计学

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