---- I have some trouble with this problem Could you do me a favour?----- Sorry, you may turn to him He has been ______ and he may know how to solve it
A、 experience
B、 expert
C、 skill
D、 around
出自:河南工学院-大学英语(高起专)

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