You      lateforyesterday’sclassmeeting，asitwassoimport...

问题详情：

You       late for yesterday’s class meeting，as it was so important．

    A．couldn’t be                    B．shouldn’t be

    C．mustn’t have been          D．oughtn’t to have been

【回答】

知识点：虚拟语气与情态动词

题型：选择题