They（）each other for more than twenty years.
A:don't see
B:didn't see
C:haven't seen 
D:hadn't seen
出自：专升本

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10245403】个 (题库试题定时更新)