第23题: [单项选择]You ______ yesterday if you were really serious about the job. A. ought to come B. ought to be coming C. ought to have come D. ought have come 参考答案:C 答案解析:本题考查情态动词ought to的用法。ought to之后接两种形式:ought to do sth,“应该做某事(现在做或将来做)”;ought to have done“本应该做的却没做”。因题