please wait here.I will be back in _____.A.two and half hours B.t_英语解答

please wait here.I will be back in _____.
A.two and half hours B.two and a half hours C.half and two hours D.two and a half hour

人气：131 ℃　时间：2019-12-24 08:18:09

解答

B
half前有a,表达几个半都是几and a half可为什么不是D?hour是可数的呀