Question

It's________. It's time________school.

   A．seven thirty o'clock;to go      B．seven thirty;to go

   C．seven o'clock;to go to          D．seven o'clock;to go

Answer 1

C 表示时间是整点，后多用o'clock，若有具体几点几分，则不再用o'clock，因而排除A。句型It's time to do sth. 该做某事了，如：It's time to go to school. 该上学了。It's time to playnow. 现在该玩了。由此可看出B、D选项的to go school答案也不正确。