it ______that pleasant music keeps people from becoming tired at their work.

来源：百度知道编辑：UC知道时间：2024/05/20 06:26:07

1.has been found
2.is found
为什么是1不是2

It has been found that pleasant music keeps people from becoming tired at their work.[人们已经发现悦人的音乐会使人在工作中避免疲劳。]
本题应该根据句意理解吧，其中，“has been found”是被动语态的现在完成时结构，表示过去就被发现，而强调过去的发现对现在还有影响。比较符合题意。[现在完成时主要强调过去发生的动作对现在的影响或结果。]
而“is found”是被动语态的一般现在时结构，表示经常性或目前的动作或状态，相比之下较不合理。
但我觉得这种句子还应根据上下文才好作出判断。

呵呵,2号中IS FOUND 是被动语态么? 不是,又没有主语,只能是1啦

The man nodded his head ,______that he would finish it weather_____. it ______that pleasant music keeps people from becoming tired at their work. It is now 5 o’clock; _____ their work by 7:00 p.m. He has made much progress,______that he is still young. A considered B considering while(!isalpha(*p)&&*p) p++ (a^p-a)%p 英语P.P.是什么意思 p.s.p游戏 p=p-next P图怎么P？