classes begin at?in the morning in my school.可以解释下为什么选那个答案么 A half past seven B thirty seven C seven and a half D half over seven

Question

classes begin at?in the morning in my school.可以解释下为什么选那个答案么
A half past seven B thirty seven C seven and a half D half over seven

Answer 1

选A 学校上课开始于早上七点半,
选B应该是 seven thirty
c 是 七个半
D 好像没这个说法.