— Do you know him well? — Sure, we _____
问题:
— Do you know him well?
— Sure, we _____ friends since ten years ago. [ ]
A. were
B. have been
C. have become
D. have made
— Do you know him well?
— Sure, we _____ friends since ten years ago. [ ]
A. were
B. have been
C. have become
D. have made