The children have been whaching TV since 9:00.

The children have been whaching TV since 9:00. They have been on TV since two years ago.The( ) ( )on TV ( ) i have been wacthing TV since 3 hours 5个同义句 l have been studying for the test since last night Since the earliest times, trees have always been very useful The following features have been added since version 呼唤英语高手1.Better turn down the TV for the children having been The Blacks___London since 1980.A.has been in .B.have been in They have been friends since they were children（对划线部分提问）划住的是 Since the days long ago ,adults and children have called the We have been on holiday since the beginning of the month Have you seen the CCTV news on TV -YES,children hed a good f