Classes (begin) at eight in most school.A.start B.starts C.are D.to be 那个可以代替括号里的词

Classes begin at eight. classes begin at enght.为什么classes classes begin at （eight）划线提问 classes begin at （eight）划线提问 .your classes begin at 7:33? We begin classes at 8：00（对begin classes提问） Classes begin at eight.对at eight提问 Classes begin at 8:00.为什么要用begin 下文说 Classes are over at four.为什么不可以说 Classes are begin at 8:00呢？ Our classes begin at eight in the morning.同义句 将begin at half classes past eight 连词成句 Classes begin at 8:30( 请翻译） Classes begin at 8:30(改为同义句） They begin classes at two o'clock and classes a_____ over four twenty-five.填什么 classes begin可不可以写成 begin the classes Our school ——at eight in the morning A.begin class B.begin classes C.begins classD.begins classes Our classes begin at 8:00.这里的 begin可以换成start吗? our classes begin at 8:00 a.m =____ ____ our classes at 8:00 a.m our classes begin at 8:00a.m.=_____ _____our classes at 8:00a.m.