欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

I became a student ten years      . I have been a student   1996. I have studied here_____  about 10 years.
A. ago, since,  for      B. ago ,for ,since,    C. ago, before, for       D ago, in, after

I became a student ten years      . I have been a student          1996.
I have studied here            about 10 years.
A. ago, since, for  B. ago ,for ,since   C. ago, before, for    D ago, in, after

I became a student ten years      . I have been a student           1996. I have studied here            about 10 years.

A．ago, since, for	B．ago ,for ,since,
C．ago, before, for	D．ago, in, after