问题
选择题
-Do you know him well ?
- Sure. We ______ friends since ten years ago.[ ]
A. were
B. have been
C. have become
D. have made
答案
答案：B
搜题请搜索小程序“爱下问搜题”
-Do you know him well ?
- Sure. We ______ friends since ten years ago.[ ]
A. were
B. have been
C. have become
D. have made
答案：B
、及的相量图。