One and half years___passed求大神帮助One and half years___passed A.are B .were C .have D .has 选择哪个?请给予解释.

one and a half one and half还是one and a half one + 名词 + and a half one kilo and a half one and a half ticket one and one half billion 是多少? what’s one third and one half one-and-one-half 是不是两层半 half的用法是 one and a half years 还是one and a half year?half具体的用法? one and one-half billion和one and a half billion那一句常用啊 one and a half hours 还是hour four and one half meters 怎么翻译? four and one-half million kilograms 是多少? 注意是：one and half 和 one and a half区别注意是：one and half 和 one and a half．他们有什么区别吗? one month and a half和one and a half month有区别吗?还有one hour and a half和one and half an hour哪个对? The meeting lasted for ( ).A.one and half a hour B.one and half hour C.one and a half hours D.one and the half hour The boy always stays there for___a.one and half hour b.one and a half hour c.one and half hoursd.one and a half hours She has read English for__________.A one and a half mouth Bone and a half mouths C one and half mouths D one mouth and half