The professor needs an assistant he can _ to take care of problems in his absence.
A.count in B.count up
C. count on D. count out
出自:西安交通大学-土木工程-英语

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