— Has Jack finished his homework yet? —I have no idea; he ____ it this morning.(2.5分)
A: was doing
B: had been doing
C: has done
D: did
出自：武汉科技大学大学英语2

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:【10245188】个 (题库试题定时更新)