By this autumn they for ten years .A. will have marriedB. will have been married C. have b

问题补充：

By this autumn they for ten years .

A. will have married

B. will have been married

C. have been married

D. will be married

答案：

A. will have married

(答案→)B. will have been married

C. have been married

D. will be married

解析：考查时态。by+将来的时间用将来完成时；by+过去时间用过去完成时。this autumn是将来的时间，故用将来完成时。与一段时间连用，用be married。故选B。