It is my suggestion that you ________ our free product sample.
A. try out B. try on C. try for D. try out for
出自:湖南大学-大学英语

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