40. You are ________ to 30 miles an hour in built-up areas.
A. restricted B. balanced C. cancelled D. challenged
出自:大学英语第二册

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