求详解,there has been a ___ of accidents at the crossroad.A series B variety C number D lot

求详解,there has been a ___ of accidents at the crossroad.A series B variety C number D lot There has been a misunderstanding. This school( )for forty years.A,open B,has opened C,has been open D,has been opened求详解 现在完成时请详解My uncle ( )abroad for years because he has no business there.A.has not been B.has not goneC.was D.is his father ____the party since 1978 A.joined B,has joined C.was in D.has been in.求详解 要详解This factory ( )for twenty years.A.has opened B.has openC.has been poen D.has been popened 在线等!求大神分析这句下语法...there has been a need for sththere has been a need for sth 不懂为什么是there has been?真是什么时态呢,.能详细些么 谢谢了! Linda__the space museum after school yesterday A.has been to B.was gone to C.wemt to 求详解 there has been a time和there had been a time有什么区别? he speaks Chinese as fluently as if he __a Chinese A were B had been C is D has been 求详解, Her car has been very dirty,she has got to _____.A.get washed B.wash C.get washed it D.get it washed为什么呢?求详解, WHERE IS MY LITTLE DOG?IT____THE BACK OF THE HOUSE FOR A WHOLE DAY为什么用HAS BEEN IN而不用HAS GONE TO（求详解） It has been there since a t_ years ago . there has never been a better time to esgapt there has been的用法 there has been a need for sth 不懂为什么是there has been?真是什么时态呢,. there has been...为什么要加been? 高中英语的一道题A modern city has been set up in -------- was a wasteland ten years ago.A.what b.which c. that d.where求详解