Ithinkwe________learntobeuseful

发布时间：2020-07-27 20:50:55

I think we________learn to be useful to people，so it is necessary for us to take part in social activities from time to time．A.mayB.ought toC.canD.need

网友回答

B解析分析：ought to do＝should do(延伸)ought to的疑问形式是把ought放在主语前面，否定形式是在ought后面加not．
以上问题属网友观点，不代表本站立场，仅供参考！