是class starts 还是class begin

是class starts 还是class begin 是class is begin还是class begin The moon looks much bigger than any other starts in the sky.in the sky 是修饰 starts 还是 两者 The moon looks much bigger than any other starts in the sky.in the sky 是修饰 starts 还是 两者 Mike sometimes talks to others in class.(同意句) Mike sometimes ( ) ( )others in clas at the class还是in the class还有是in class还是at class.晕了. 到底是 at class 还是 in class?at the class 还是 in the class?晕了. 是Class begin.还是Class begins.还是Classes begin.为什么? The science class starts at 3:00 p.m为什么用starts Our ___(one) class starts at 8'o clock. 是after class对还是after the class对? 是of our class,还是for our class? 是before class begin 还是before class is begin class's还是class’ The ___ class starts at 9:00 am.这是一道选择题.供给选择的答案有：A.last B.one C.first D.two说明原因 healthy life start here 还是starts here? 说开始用Start!还是Starts 是用Class begin 还是Class begins好像class begin是习惯用语,但应该用三单!