It is difficult for us to finish the work today.thank you ！my pleasure,采纳吧，亲再问问，I think. The robot can 't do the whole work. 怎么和并为一句I don't think the robot can do the whole work.还有My sister can work out the problem. 的同义句是什么妈啊，咋这么多呢The problem can be worked out by my sister“一种……”是什么意思My sister 在句首My sister is able to work out the problem