In the 1950s in the USA, most families had just one phone at home, and wireless phones _______ yet.
A：haven't invented
B：haven't been invented
C：hadn't invented
D：hadn't been invented
现实生活中，我们会遇到各种各样的“标志线”。下列属于关爱公民生命健康权的“标志线”是（ ）
①横穿马路的“斑马线” ②施工现场的“警戒线”
③银行窗口的“1米线” ④火车站台的“侯车线”
2015年4月的某一天，某校高三学生张某上午放学时，在教学门口不小心踩了王某的脚，王某对张某破口大骂，张某忍无可忍，对王某大打出手，将王某打成重伤。目前，张某已经被警方刑拘。
