Our English teacher is very nice. We friends since three years ago.A. wereB. becameC. ha

问题补充：

Our English teacher is very nice. We friends since three years ago.

A. were

B. became

C. have been

D. have made

答案：

A. were

B. became

(答案→)C. have been

D. have made

解析：本题难度适中，考查现在完成时，由since three years ago，可知答案选D，C是被动语态。