Busesandcars________stopwhenthetr

发布时间:2020-07-27 03:59:59

Buses and cars ________ stop when the traffic lights are red.A.canB.mustC.mayD.need

网友回答

B解析must指“必须”,“应该”.
以上问题属网友观点,不代表本站立场,仅供参考!