Every means ________ tried, but we still cannot solve this problem.


A、 is


B、 have been


C、 are


D、 has been
出自：石家庄铁道大学大学英语1

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)