题目内容：

为什么不选a?
the bell is ringing.it is time that we __ the class.
A begin b should begin c are beginning d began

优质解答

it is time that we began the class.该开始上课了.
这是it is time that 的固定用法,到该做某事的时候,用过去式来表达!
it is time that we went to bed.
该休息了.