Has there been some _____at the bankA.Wrong B.Trouble为什么？

英语翻译There has been some research on modeling and simulation of the railway transportation system Has there been some _____at the bankA.Wrong B.Trouble为什么？ there has been的用法 There has been a misunderstanding. there has been...为什么要加been? He knows Wuxi very well because he has been there ___ A sometime B some time C some times There has always been some pavement between a person and a family.怎么翻译 重点是pavement怎么翻译 Some students haven't been there there has/have been的用法 he has been there _twice____.画线提问 We love,difference has always been there. He has never been there.英译汉 英语主谓一致题--- Would you like some more apples?--- No,thanks.I think there ________ enough for me.A is B areC has been D have been My father ,toghther with some of his old friends,( ) there already .A.will be B.were C.has been D.have been He knows the rules because he has been there（some times/sometime/sometimes)选some times 为什么?这三个词有什么区别? 翻译:She has never been there,has she? He has been there for six months.为什么不是has been in there? 英语翻译Although the prevailing supposition has been that it is too hot for microorganisms to survive deep below the Earth's surface,some scientists argue that there are living communities of microorganisms there that have been cut off from surfa