We consider _____ the instrument be adjusted each time it is used.( )
·that it necessary
·it necessary that
·necessary that
·necessary of it that
出自:佳木斯大学语言治疗学

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