seven and a half percent是百分之多少?

请问“seven and a half thousand”到底是多少?晕了. seven and a half percent是百分之多少? 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 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 sevenC seven and a half D half over seven Tom and Mike meet at half past seven.(对 at half past seven 提问） SAT问题：Milk costs x cents per half-gallon and y cents per gallon. If a gallon of milk costs z cMilk costs x cents per half-gallon and y cents per gallon. If a gallon of milk costs z cents less than 2 half-gallons, which of the following equation What is the time?-____.A.It's half to seven.It's half past seven 为什么7:30是half past seven.而不是at a half past seven 英语考题 Today Tom gets up at half past seven and hurry to ()A.school B.breakfast one and a half At half past seven l c______ a train. half past seven, a quarter and a half a billion and a half THREE AND A HALF怎么样 one + 名词 + and a half three-and-a-half billion one kilo and a half