选A（七点半）
B的话应该是seven thirty,C和D好像没有这种表达.可以用排除法.
Classes begin at in the morning in my school
Classes begin at in the morning in my school
求语法解释下为什么选哪个
A half past seven B thirty seven
C seven and a half D half over seven
求语法解释下为什么选哪个
A half past seven B thirty seven
C seven and a half D half over seven
英语人气：105 ℃时间：2019-11-17 04:47:03
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